Computer Configuration > Administrative Templates > Microsoft Edge - Default Settings (users can override) > Printing
Both
HKLM\Software\Policies\Microsoft\Edge\Recommended
Force 'headers and footers' to be on or off in the printing dialog. If you don't configure this policy, users can decide whether to print headers and footers. If you disable this policy, users can't print headers and footers. If you enable this policy, users always print headers and footers.