It dosen't work for me at all (Aqara U200). On the device page Matter lock, the Manage lock option opens a dialog where there is no users although I have 4 configured before, I can add new ones, but no edit existing ones, or remove them.
I played a bit with it and it seems, there are two different sets of users. To me it looks like I have a set of users for the Aqara Home App and a set for Home Assistant / Matter. If I look at Aqara I only see those users, If I look in Home Assistant I only see the others.
I have no Aqara Matter Hub and therefore no Matter connection for the Aqara App.
Not what I expected or hoped for, but at least I can setup temporary users with HA.
Would be nice to get the user management unified in the future.
Yes, it seems to work as you say, but there should be a single user management system, not two. Also, the users you define in HA can only work with the PIN and not with the fingerprint. Hopefully this will be fixed in the future...