Here is another “complication”, but don’t panic (at the end, I tell why): At the moment, storing and using passkeys is only possible via the browser extensions.
(see here: Storing Passkeys | Bitwarden Help Center)
It is planned, that you can store and use passkeys with the mobile apps “in the future” (and I think, it will later follow for the desktop app and the web vault/app as well)
(see here: Storing Passkeys | Bitwarden Help Center)
Now, the good news is: someone from Bitwarden wrote here the other day, that using and storing passkeys with the mobile apps could follow in 1-2 months, so possibly even this month or May/June… (PS: I found the post of the Bitwarden team member: Passkeys support for mobile apps - #20 by go12)