Both the F-22 and F-23 have internal weapons bays like a bomber does, except that the fighters carry less ordnance but sometimes the fighters will carry the same types of ordnance that some bombers do. As for their fuel capacities and where they’re situated, I have no idea but I’m sure if you Googled for a cutaway illustration of either of these fighters, you’ll be able to see where they are.
But given the shape, there isn’t much internal room, and that’s my point. Consider how they’ve put conformal tanks on the later F16s.
The YF-23 is a pretty and sleek plane, but there isn’t much volume to it.