Ripple on M1 MBP screen glass?

Hi just wondering if anyone has noticed a ripple sort of effect on their M1 MBP glass, noticed it the other day whilst cleaning my screen.

It can only be seen side on in a light room when the screen is off… I am presuming it is like an anti reflective coating or maybe something under the screen (maybe adhesive or something similar).

I have taken a photo of my screen, it is hard to pick up but if you zoom in where the green bottle is in the reflection you can see how the ripple distorts the reflection.

Anything to worry about or is it normal? I am presuming it’s fine but just wanted to check.

TIA