They are not, although it has now been reported elsewhere: https://bugzilla.mozilla.org/show_bug.cgi?id=1894644.
As far as I can tell, Firefox Nightly and Firefox Focus are working, while Firefox Beta and the standard Firefox release are not [Android 13].
We are really trying to fix this in a native Android way, but we can’t compromise security, as I mentioned before. Users need to sign in before each password fill. The native Android approach to autofill has some limitations, making it difficult for us and other password managers with stricter security policies to implement a fix.
You may also want to vote here: https://community.passbolt.com/t/integrate-passbolt-with-keyboards-suggestion-api/9287