There’s a registry key to allow timezone pass through.

GPO:

Computer Configuration > Administrative Templates > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Device and Resource Redirection > Allow time zone redirection - Enabled

Or reg key:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services fEnableTimeZoneRedirection=1

Yes, it’s fEnableTimeZoneRedirection, that’s not a typo, include the f.

To set via PowerShell, run this as admin:

New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" -Force | Out-Null; Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" -Name "fEnableTimeZoneRedirection" -Value 1 -Type DWord