There seems to be a bug in windows server 2019 that doesn’t allow time zone change.
In order to change the time zone, go to command line in elevated administrator role.
This will list all the time zones, copy the time zone you want and run the following command:
tzutil /s “Eastern Standard Time”
In this case I selected “Eastern Standard Time” You need to pick the zone you’re in.
If this helped you please please consider buying me coffee! Thanks in advance!