Help with Airport Express + Ethernet + Google WiFi

Hey everyone! Need some help. My setup: ATT Fiber with Pace 5268AC Router, Google WiFi Mesh with primary AP connected via ethernet (others spread across house), 3 Airport Express connected to a hub which is connected to the Pace via ethernet. I've turned off WiFi on my Pace and I still don't see the Airports. I could see the Airports before when WiFi was turned on with my Pace, but it was a different network than Google. For clarity - I had 2 wireless networks. Network A (Pace), Network B (Google). I want all devices to use Network B. When network B is on, I no longer see my Airports. Is this because the hub is connected to the Pace vs Google WiFi?

I can hard reset, but I'd prefer not to. I could also try and connect my hub directly into the Google AP, but I'd have to go to some trouble moving everything since most components are rack mounted.

Any recommendations on how to get my Airports to show up again?