Orbi RBR850 - can't run Amazon Prime Video and IPhone wifi calling fails to send voice

So an update from me, I've contacted AT&T about upgrading the pace 8268AC, and they don't have any of the 210's in their warehouse. They wanted to send me a 'newer' version of the PACE 8268AC...I declined...so I have to wait a week or so, call back and see if they have newer one's in the warehouse. oye.
Because of all the problems, and needing wifi calling to function, I returned the last Orbi (#2) and now am trying a ROK, which doesn't match the speeds that the Orbi did, but does come with wonderful debug tools. So now, can someone tell me if the channels used on an Orbi are customizable, other than the 2.4 channel. The reason I ask is, in switching the channels on the ROK the 5g#1 channel works best at 60 as the control channel, and the 5g#2 works best at 140 for the control. Their 'radar' tells me that only one other wifi is running in the 11 channel for 2.4g, where as the 2, 4, 6 channels, several wifi's are using them.  And by the way, by adjusting the channels, I"m getting wifi calling to function. Of course the lovely support people at AT&T turned the pace radio's on...and hosed my phone call with them, but now that they are back off wifi calling seems to work. And maybe this should be a different thread question, but I read through the documentation and it doesn't mention being able to change those 5g channels, just what they are set at...

TIA!

-Dan