Does ePMP 4K support ethernet flow control?

I have ePMP 4600/4500 APs connected to Netonix switches that also have other devices like AirmaxAC or Wave APs. Normally I have flow control enabled on the switch ports and I noticed that the Netonix switch reports that only the Cambium ePMP 4K APs do not support flow control.

If I keep flow control enabled on the switch then this could cause issues as the ePMP 4K APs do not participate in the congestion control.

Is there a setting somewhere I can enable it? If not why do they not support it?