I was able to use Neo Store to export favourite apps as you suggested, but I wasn’t able to import apps back, not sure what am I missing …

I use Simple - Social Browser - https://play.google.com/store/apps/details?id=com.creativetrends.simple.app

Thank you for your comments.

Neo Store, does show you all F-Droid apps and lets you export all favourites apps to an .xts file. I uninstalled few apps from my phone, but I wasn’t able to import the “missing” apps from the list in the .xts file.

APK Kit lists all instated app on my phone, including Google play store and F-Droid, so this is not very useful (to me).

As for NeoBackup, I do need an app for a non rooted device

and Restic, is not that clear how to backup list of F-Droid installed apps and how to use it to restore missing apps.

Great list, here are some more apps to consider to add to the list: InnerTune, Amaze, DiskUsage, DuckDuckGo, K-9 Mail, KDE Connect, Video Transcoder, Notally.