Just in case it helps - I followed this guide to get Mint’s Network Manager working with the Cisco AnyConnect OpenVPN thing (needed it for work) which worked well for me, I guess the steps should be fairly similar for other stuff.

Edit: fat fingers made me type “caze” instead of “case”.

RFM Radio popped up when I searched on f-droid (IzzyOnDroid) just there, says it’s incompatible with my version of Android and it requires root but it does actually use FM radio.