To check the current region settings on your PS4, follow these steps:
Navigate to the PlayStation Store on your PS4.
Press the three-dot icon (or "Options" button) to show more options.
Select "Payment Method".
Scroll down and select "Pay by Mobile".
In the pop-up window, you'll see the region you're currently set to for the PlayStation Store. This region is typically the same as the DVD region on your PS4.