@K9cousin 

The AX20 does not control what device connects to it nor does your wireless router it will come down to your actual device to decide that. Manufacturers will set the determination based on signal strength or until the current signal is gone, it varies. You may need to look on whatever device you are using to see how it may determine that.

@Tony 

I do realize that it's the device that determines that not the router/AP. I'm assuming that if I set up the AP correctly any device moving around the house would toggle ( auto-connect) to either WiFi source dependent on signal strength. Right now none of the devices in house do that. We have to manually switch to the ssid that emits the strongest signal. 

@K9cousin 

If you have a mesh system, and your devices supported mesh, then yes it would do that. Since you have two network devices (Verizon and AX20) neither the Verizon router or AX20 can recommend what to connect to.