F-droid tends to fill the gap for Andriod, but not enough developers sending their apps there. I guess when there's no monetary incentive, it's only the open source crowd that will participate
Fdroid was the thing I missed most about moving to ios. Sure, it had a limited app selection and the apps were basic. But every app on fdroid had a really wholesome feel to it, like the app devs have made this just for you to enjoy and not to try to squeeze money from you.
Now on the app store, absolutely everything is crammed with adverts, tracking IAPs, and subscriptions. I can't just install an app and expect it to work because there is always some catch that ruins it.
F-droid also has the sane condition that all apps it distributes need to be built from source on its build infra (basically all Linux distros require the same).
While really good for security and debugging I can imagine it can be complicated to suport for many less experienced developers used to cooling stuff together in an Android IDE where a binary APK falls out at the end that they then upload to the store.
