What are those tiny, millet-like bumps rising inside the cheeks?

I don't have skin that gets big pimples, but recently, when I look closely at the inside of my cheeks and the sides of my nose, it seems like the number of bumpy, granular areas has increased.

It isn't red or painful, just feels a bit rough to the touch, but it bothers me because it stands out more when I wear makeup.

At first, I thought it was just dead skin cells, so I used a peeling product, but it didn't make much of a difference and actually made my cheeks drier, so I stopped using it.

I am wondering if this needs to be managed like milia or comedones.

I would like to know if I need to extract them, or if it is okay to just manage them to prevent sebum and dead skin cells from accumulating.

I want to avoid accidentally touching it and causing it to become inflamed, so I would like to consult about the correct management method.