No one really knows how is behind cleanapk and no one really knows from where the apks are coming. And Cleanapk is for closed sources apps and is adding some FOSS apps from F-droid. So you can’t the cleanapk repository to f-droid.
The way is F-droid ->> cleanapk and not cleanapk → F-droid
The best way to install apps is F-droid and Aurora from f-droid
It’s the third one in the list, but it’s the second one with “Aurora” in its name .
It’s “Aurora Store”, but there’s a description sorting things out anyway.
Is there another appstore like in e/os that you can use without Google, even without a fake account? Because Aurora does not work here in the office, because Google is completely blocked.