Error making flatpaks declarative

I’m trying to make flatpaks declarative in my flakes from this project

This is my flakes setup

It seems I’ve gotten 95% there to working correctly. I updated the following .nix files to get it running.
flake.nix flake.nix — Codefile
user.nix user.nix — Codefile (home manager configuration)
flatpaks.nix flatpaks.nix — Codefile (added to the home directory)
Added services.flatpak.enable = true; to my services.nix in the core directory.

Rebuilding went smoothly with no errors. Afterwards, I get these results from flatpak in the terminal

---> flatpak remotes
Name         Options
flathub      system
flathub-beta system
flathub-beta user

However, none of the flatpaks installed as evident from the terminal when I type flatpak list. Nothing appears. So, it accepts the remote to be declarative, but doesn’t install any flatpaks. Any ideas why? Thank you!