Show all domain users on logon screen

hi there,

i have three users, who share a PC. PC is in a local windows domain. all three users a domain users and already logged in on this PC successfully.
PC has a local admin account.
How can i show all three users on the bottom left list in the login screen?

i tried already with

the local admin in gpedit:

Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options:
    Interactive logon: Don’t display last signed-in: Disabled
    Interactive logon: Don’t display username at sign-in: Disabled
Computer Configuration -> Administrative Templates -> System -> Logon:
    Block user from showing account details on sign-in: Disabled
    Do not enumerate connected users on domain-joined computer: Disabled

this doesnt work, still shows only the last (domain or local) user

and

Computer Configuration -> Administrative Templates -> System -> Logon:
    Enumerate local users on domain-joined computers = Disabled

doesnt work too, this shows additional to the last user (as before), all local users (which in my case, is the local admin).

i searched already at
https://answers.microsoft.com/en-us/windows/forum/all/show-multiple-active-directory-users-on-win-10/9235b85f-9f5a-472d-b347-ac39f0ce8e66
https://answers.microsoft.com/en-us/windows/forum/all/show-all-domain-users-in-the-logon-screen/d9d53ce2-e13c-4613-9261-adbe3f8d7a0e
..and so on
but could found a working solution

hope someone can help, thanks