You can use something like Codeberg to host a repo.
You can use Obtanium, Accrescent or F-Droid when careful to install apps.
You can use Bitcoin and utility cryptocurrencies (XMR, BCH [I know, it seems dumb], etc.) to buy things (if and when supported).
You can use decentralized protocols like Mastodon or #nostr to speak freely.
This is what happens when you leave Roman Catholic nonsense, and give a middle finger to the Pope's Unum Sanctum-based BS authority.