Just found this method as well. Give it a shot
Why does my Windows 10 login screen not show other users
How do I show all users on my login screen,.?
**Show all users that are added to a computer:**1. click on the Start menu and search for "gpedit.msc." 2. Open "gpedit.msc." 3. Navigate to the following path : Computer Configuration ->
>> Administrative Templates -> System -> Logon.
- Find the setting "Enumerate local users
on domain-joined computers." - Enable this setting.
From there, follow these steps
click the Advanced button and then click the Find Now button on the right-hand side of the screen.
On the search results, select the username. That isn’t appearing on the login screen