Is there any way to fix screen rotation in iPad apps that don't use the Requires Full Screen option?

Is there a way to lock the rotation of the app when the app is in full screen state in an iPad app that doesn't use Requires Full Screen?

Disable Requires Full Screen option

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?)

I know that even if the above function returns a value that locks the rotation, the device is not.

But iPad users who use my app send me an email asking if I can provide a function to lock the rotation of the app.

I would like to know if there is a way to lock the rotation even when in full screen.

Or can't Apple support it in a future update?