@kaia hey I might be able to help with this. They're backed by CalDAV, so the tasks are actually attached to a calendar.
@kaia so there's a chance that they are both looking at different calendars. Also, you may have to go to settings in the tasks app and them enable them under displayed lists
@kaia nw, I have similar setup using DavX app to sync my stuff - ask again if you need anything!
@kaia @arichtman alternatively to Bitwarden: use Vaultwarden. Better choice than a sync of keepass files (been there)
@antondollmaier @kaia in 100% honesty, my home setup doesn't have any record of availability and isn't at all set up for backups yet. It's a price I'm more than willing to pay for something so critical to my digital life.