Problems with Eero Pro 6 and MyQ

I just had my ISP (Hotwire Communications) install a new Eero Pro 6 to replace my old Netgear Nighthawk R7000 router which has finally gone to its just reward in the ethernet. I was finally, with Eero support's great assistance, able to connect two older, 2.4 devices (a Sony Soundbar and a Trane ComfortLink smart thermostat) to the new network.  (The key was to remove the apostrophe from my SSID.) All the Apple devices and the TVs connected without any glitches 

However, I am still have problems getting my Liftmaster MyQ garage door opener to connect.  I press the "Learn" button and  hear the beep. I see the network starting MyQ in my iPhone's settings, and try to connect to it, but my iPhone says that there is no connectivity for this device.  Any suggestions? I tried shutting off the 5 G network under troubleshooting, but still nothing.  TYIA.