If you need a cross platform authenticator, do check it out.
FOSS, optional e2ee backups.
I followed this guide - basically, run an older version of authy with devtools enabled and use the js console to export your items.
https://gist.github.com/gboudreau/94bb0c11a6209c82418d01a59d...
If anyone else is considering a switch, our community has documented a migration guide here: https://help.ente.io/auth/migration-guides/authy
If you need a cross platform authenticator, do check it out.
FOSS, optional e2ee backups.