Depends on the bank. Graphene has support for seedvault backups, or you could use syncthing-fork to sync the data over. Or any one of those Foss airdrop clones

I just set up molly today, along with mollysocket and an ntfy server. Liking it so far, just need to get my friends to migrate…

You can forward yourself iMessages from a mac via bluebubbles

I’ve been meaning to try https://github.com/kd2org/karadav out, lightweight server that supports nextcloud applications. Has anyone else tried it out?