Are those small white granules on my cheeks all sebum?

I am wondering how to distinguish between sebum and milia when there are very small, white bumps around my cheeks. Even though they aren't very red or painful, having small bumps on the skin surface keeps bothering me.

Some parts may appear to naturally decrease, while others may remain for a long time, so I am not sure if they are all the same type of skin problem.

Just because you see small granules, I don't think you necessarily have to squeeze or extrude them by hand.

I would like to know how to determine if there are cases where it is okay to just monitor the skin without treatment, or if professional care is required, depending on the condition.

I would also like to know if dermatologists differentiate between small comedones and other types of skin bumps during consultations.

If it is indeed sebum or milia, I am wondering if there are ways to manage it other than extraction. Since redness can remain on the cheeks after irritation, I would like to avoid touching them too roughly. Is it possible to receive treatment only on the necessary areas after accurately assessing my current skin condition?