Black dot on both glass screen and the display
I've been using this 7th Gen iPad for a year and a half after I received it form my dad(I don't know when he got it). I just noticed that there is a black dot on the screen and the display. It just suddenly showed up. It is both on the screen and on the display. If I look at it at right angle, it exactly on the same spot. What might have caused this and what can I do?
iPad, iPadOS 15