Weird Keyboard Behavoiur, 1 to = keys plus Fn not working as intended

Hello new to Nix and this forum ! :

I have a Drevo Seer Pro about two days ago when I press Fn plus any of the number row instead of getting the F keys ( F1 to F12 ) I am getting for example “Increase and Decrease Brightness”.

A - Things to note :
A1 - Fn + other keys work as intended.
A2 - If I plug the very same keyboard to Windows it works as intended for F1 to F12.
A3 - If I plug another keyboard to the machine ( though different model ) it works as intended.
A4 - Using no drivers or special software in either the NixOS or Win PCs.

B - Things I tried :
B1 - It seems this keyboard has no Fn Lock.
B2 - Checked the notebook keyboard for Num Lock, and its BIOS options.
B3 - Tried other USB slots and with another cable.
B4 - Checked GNOME config through its UI.
B5 - Reviewed configuration.nix.
B6 - Turning on and off different Accessibility Options
B7 - Resenting the keyboard ( Fn + Space for 3s )
B8 - Turning the wireless keyboard mode on and off
B9 - Using Mac mode, Windows mode but for some reason I can’t seam to be able to use Bluetooth mode ( maybe coz I removed its battery since it was dead )

C - Things I was experimenting on the previous days :
C1 - Installing NVidia drivers.
C2 - Using ADB and scrcpy ( Android Debug Bridge, and scrcpy is an Android Mirroring script )
C3 - Using Accessibility Options, On Screen Keyboard
C4 - Using On Screen Keyboard with scrcpy
C5 - Asigning a keybind to On Screen Keyboard ( Shift + Alt + Ctrl + Supper + K, which I removed afterwards )

Some Data :
PC = ASUSTeK COMPUTER INC. N56VB
OS = ixOS 23.05 (Stoat)
OS.build = 23.05.5533.70bdadeb94ff
GNOME.ver = 44.2
Using X11 and NVidia Propiertary Drivers
Keyboard = Drevo Seer Pro
Keyboard.note = I removed its dead battery

I can not say for certain but it feels like something related to the On Screen Keyboard but again no problems with other keyboards, its quite a small mystery that’s driving me nuts ( No F2 to rename ! ).

Any help appreciated, THANKS FOR YOUR TIME and if I should post any kind of files let me know, noob here.

# configuration.nix : just the locales part
# Set your time zone.
  time.timeZone = "America/Argentina/Buenos_Aires";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_NZ.UTF-8";
    LC_IDENTIFICATION = "en_NZ.UTF-8";
    LC_MEASUREMENT = "en_NZ.UTF-8";
    LC_MONETARY = "en_NZ.UTF-8";
    LC_NAME = "en_NZ.UTF-8";
    LC_NUMERIC = "en_NZ.UTF-8";
    LC_PAPER = "en_NZ.UTF-8";
    LC_TELEPHONE = "en_NZ.UTF-8";
    LC_TIME = "en_NZ.UTF-8";
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;

  # Enable the GNOME Desktop Environment.
  services.xserver.displayManager.gdm.enable = true;
  services.xserver.desktopManager.gnome.enable = true;

  # Configure keymap in X11
  services.xserver = {
    layout = "us";
    xkbVariant = "";
  };

  # Configure console keymap
  console.keyMap = "us";

B10 - I just tried to enter the notebook’s BIOS using the keyboard and I could ! that means that Fn + 2 = F2 but then Doesn’t this mean it is an OS problem?

Q1 - Where should I even start looking for?
Q2 - Could it be related to the On Screen Keyboard ( it’s off ) or scrcpy ( as if the PC is holding the keyboard in some kind of Android mode ) ?

Attaching my /etc/X11 conf files :

00-keyboard.conf

Section "InputClass"
  Identifier "Keyboard catchall"
  MatchIsKeyboard "on"
  Option "XkbModel" "pc104"
  Option "XkbLayout" "us"
  Option "XkbOptions" "terminate:ctrl_alt_bksp"
  Option "XkbVariant" ""
EndSection

10-evdev.conf

#
# Catch-all evdev loader for udev-based systems
# We don't simply match on any device since that also adds accelerometers
# and other devices that we don't really want to use. The list below
# matches everything but joysticks.

Section "InputClass"
        Identifier "evdev pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

Section "InputClass"
        Identifier "evdev touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"
EndSection

40-libinput.conf

# Match on all types of devices but joysticks
#
# If you want to configure your devices, do not copy this file.
# Instead, use a config snippet that contains something like this:
#
# Section "InputClass"
#   Identifier "something or other"
#   MatchDriver "libinput"
#
#   MatchIsTouchpad "on"
#   ... other Match directives ...
#   Option "someoption" "value"
# EndSection
#
# This applies the option any libinput device also matched by the other
# directives. See the xorg.conf(5) man page for more info on
# matching devices.

Section "InputClass"
        Identifier "libinput pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection