Flatpak doesn't work

Hello, I installed Flatpak on Ubuntu Budgie via Budgie Welcome.
After installation I restarted the computer and started gnome software center.
But there are no flatpak programs in Gnome software center.
I removed flatpak and reinstalled, restarted the computer but still no flatpak programs in Gnome software center. My version of Budgie is 21.04

seems to be ok here - I’ve just used welcome - restarted - chose Chromium and can see both flathub and snap variants

Are you sure you are using the deb version of gnome-software - i.e. you havent accidentally installed the snap version of gnome-software?

I installed Budgie and gnome-software-center was installed during installation of Budgie. In synaptic following apps are installed.
gnome-software 3.38.0-2build1
gnome-software-common 3.38.0-2build1
gnome-software-plugin-flatpak 3.38.0-2build1
libflatpak0 1.8.2-1ubuntu0.1

what about snap list ?

Name Version Rev Tracking Publisher Notes
core 16-2.49.2 10958 latest/stable canonical✓ core
core18 20210309 1997 latest/stable canonical✓ base
gtk-common-themes 0.1-52-gb92ac40 1515 latest/stable canonical✓ -
gtk2-common-themes 0.1 13 latest/stable canonical✓ -
snapd 2.49.2 11588 latest/stable canonical✓ snapd
ubuntu-budgie-welcome 0.14.12 313 latest/stable/… ubuntubudgie classic

Run the following and reboot

flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

Sorry, did not work.

Reset gnome-software:

killall gnome-software

rm -rf ~/.cache/gnome-software

sudo flatpak update

Then reboot - this should force gnome-software to redownload its catalog

Sorry, didn’t work either. It is not a big problem. I used a number of appimages, and wanted to switch to flatpak. If it is not working, than I always have the option to install budgie fresh.

'fraid - that’s as far as my knowledge of gnome-software goes.

Thank so far. For now I use appimages. When i reinstall budgie, I see whether it works or not.
Thanks again.

Don’t forget you can browse flathub and install using the instructions on the website

https://flathub.org/apps

Yes, oke, I know, Thank you.