Trying to setup an alternate keybind for when I’m connecting via VNC on my iPad Air using my Magic Keyboard

I’m trying to setup a keybind for when im using my iPad via VNC, the option key shows up as ISO_Level3_SHIFT and also shows as Mod5 it appears to be locked because when i am using wev to see info i notice it doesn’t register key combos, anyone know a way around this?
Video showing what wev shows

Thanks in advance!