Any old router that you have lying around the house, or can be picked up locally secondhand for no or minimal cost can probably be put in access point mode.
I don't see the question as "what do I need', but "how do I make it work with what I've got".
The access point I have in my garden office, for example, is an old TPLink AX50, which has done it's time as a router and is now an access point. Nothing wrong with it.