Latest F-Droid 1.17 has targetSdk at 28 and F-Droid Basic has targetSdk 33
Other clients should NOT be recommended due to lacking mirror support for downloads, incremental index database downloads, or any metadata localization support.
Use of other clients without mirror support effectively ddos’es f-droid.org and it is negligent to recommend them.
f-droid.org pushed out nearly 186TB in June alone.
There are now over 160 published reproducible author builds: F-Droid: "Our monthly overview of F-Droid apps published wi…" - FLOSS.social
Besides FCM
Encrypted or not, it is a proprietary serivce.