What are these bumps?

I can’t figure out if this is cradle cap or something else. Doesn’t seem to bother him, and sometimes it does get flaky and dry. I’ve tried olive oil, washing it then putting on various creams and nothing seems to help.

There are two round spots on the back of his head and a larger irregular shaped spot on the top of his head. It’s been there for a few months but has recently grown and gotten worse. The doctors have never said anything about it at any oh his appointments 🥴