[Updates] GPOs Configure Automatic Updates vs. Specify deadlines for automatic updates and restarts

Dear all,
we have about 500 Windows servers in our Standalone WSUS environment.

I would like to change local GPOs for the (new) non-AD-members, so the compliance related to Windows Updates is improving.

Mostly we are using GPO Cofigure Automatic Updates with AU options 4 (schedule the install) as of today. As far as I know, the new GPO “Specify deadlines for automatic updates and restarts” ignores the Configure Automatic Updates GPO with all the AU options (See
https://learn.microsoft.com/en-us/windows/deployment/update/wufb-compliancedeadlines), so they can not be combined together.

Question 1: Is it true? Do you have some up-to-date information about that?

Reading through the update baselines
https://www.microsoft.com/en-us/download/details.aspx?id=101056, as far as I can see, the Configure Automatic Updates GPO will be not supported in the future and some related GPO settings are not even recommended due to this reason because they might not work as intended.

Question 2: Is it true? Do you have some up-to-date information about that what is still supported?

Question 3: Do you know a deadline to deprecate the Configure Automatic Update GPO by Microsoft? (We are planning to have some scheduler settings to begin the installation of Windows Updates and as I can see, “Specify deadlines for automatic updates and restarts” can not do that (it can only schedule the restart) and Configure Automatic Update GPO seems to be moved out from support slowly.)

I also checked this material but could not find a focused material for Windows Updates only, especially for servers:

https://www.microsoft.com/en-us/download/details.aspx?id=55319

Question 4:

Do you have where to find such a material for Windows Updates only or who to ask for them? (Mostly for Windows Server 2016, 2019 and 2022).

Many thanks upfront for your answers.