Please can you provide the output of running the script I provided?
rm -f eos-update-flatpak-repos
https://raw.githubusercontent.com/endlessm/eos-boot-helper/eos3.3/eos-update-flatpak-repos
chmod +x eos-update-flatpak-repos
sudo ./eos-update-flatpak-repos
I know you ran this before, but without knowing what the output was, it’s not really possible to help further. On this thread it did the trick for someone with (what seemed to be) exactly the same problem with the missing gnome remote.