I have used discover and other similar apps like the Pop shop but man are they just not quite there yet imo.

I installed Pop!OS on my media pc recently and that gave me more problems than discover on my main pc running Fedora.

Both were good for finding apps but installing was kind of a pain. Usually it would crash, or not install at all, sometimes canceling would hang forever, etc.

Though this could be due to my internet being shit where i live atm so ymmv.