What's the problem with the built-in one in Firefox? It has optional syncing if you want it.
Firefox Lockwise is very new and quite frankly doesn't have very many features that people require such as import, export, etc. At this point I don't even know how to get all my password manager passwords into Lockwise even from a simple comma delimited file.
Right now, it's still impossible to switch to it for a lot of people.