I noticed that use Edit=Allow only autoconfirmed users for items and for pages in the project namespace, but for properties the option seems to be gone. As an admin you can see this at https://www.wikidata.org/w/index.php?title=Property:P3452&action=unprotect for example.
Still means the wording of the protect page is incorrect. Currently it says "all users" and "allow only administrators". The "all users" is not correct because changing the protection to that won't make it possible for all users to edit, only for autoconfirmed users and above. I see we have T266394 for that