Are these vents supposed to be there?

Hello — could I ask the advice of the insulation brain trust? I have found some vents in my newly purchased house that just don’t seem to have a good reason to exist — and I worry, they are leaking conditioned air. They are the kinds of events that you usually put in the soffits of vented attics to allow airflow from bottom to top. And in some places in the house, they have been installed in exactly that logical application. But there are a few places where it looks like the builders installed vents in places that they should not have. Namely: (1) under some overhanging living areas. See the first couple of photos. (2) in the soffits of a part of the roof that has vaulted ceilings and hence there is no attic space, just batting insulation. See the second couple of photos.

Any advice? Should I close off these vents?

Thank you!