Hi, this is the problem with flatpak (and snaps) is that they are 'sandboxed'. If I were still using Zorin, the first thing I would do is:
-
Remove both flatpak and snap.
-
Install Synaptic Package Manager:
sudo apt install synaptic
- Remove gnome-software (Software)
sudo apt-get remove gnome-software
Synaptic can be used to both update system software and applications. To check for updates in Synaptic it is a simple case of clicking on 'Reload', then 'Mark all upgrades' and if there are any it will open a window to show what updates are ready to be installed, then click on 'Apply'. Job done. Synaptic only uses APT.
If you want a separate application updater, 'Apper' is quite snappy (no pun intended).