You should not use F-droid. Their audits are security theatre at best. There are numerous severe security flaws in F-droid. Only use it where no other alternative is present and for non-critical apps, preferrably not at all. There are extensive explanations on this topic here under some of the F-droid threads.
You'd better use obtainium pulling from the Developers Git repository directly if they offer prebuilt apk's.
Here is how I would rank the options from best to worst.
- Accrescent
- Google Play
- Obtainium+Developers Git
- Aurora Store
- F-droid