It’s unlikely you would want to use a higher Zigbee channel, but since there are already at least three different FAQs on how Zigbee channels and Wi-Fi channels overlap, you should just take a look at one of those if you are interested in that.
FAQ: What WiFi Channel is least likely to interfere with SmartThings?
FAQ: Networking and Reducing Channel interference between WiFi and Zigbee
That said, under the new architecture, we no longer have the ability to change the Zigbee channel on a smartthings V3/Aeotec hub. I suspect this has to do with how thread was implemented. 