Will two devices on same access point communicating go through router or within Access point?

Hi, this question is just out of curiosity. Currently I don't have seprate AP with router to test this out. So I'm asking here:

If a access point (AP) is connected to router (R) and two wireless devices on different bands (W-2.4Ghz & W-5Ghz) are connected to AP.

If both these wireless devices (W-2.4Ghz & W-5Ghz) need to tran5 data with each other. Will the data be routed directly within AP or will it go W-2.4Ghz --> AP --> Router --> back to AP --> W-5Ghz?

Thank you