I saw that the app “Kiwix” has diffrent permissons on “Google Play Store” and in F-Droid. Could you check witch permissions exist and not. On “Google Play Store” it’s written that Kiwix needs location permission, for example. Maybe this is a new permission that came with the latest version, I don’t know.
Why not compare them with these mentioned here? https://f-droid.org/en/packages/org.kiwix.kiwixmobile/
Or get some apps https://search.f-droid.org/?q=permission