I've never been able to get my wifi point to work on Google WiFi. It just fast blinks read.
Edit: after doing more digging it appears AT&T blocks NTP requests when using DMZ+ mode if an NTP request is being sourced on port 123. Would it be possible to update the access point to use an ephemeral source port port so the traffic would be allowed? Please see below:
"Re: Pace 5268AC in DMZplus blocks UDP 123 (NTP)?
I have confirmed that if you initiate a UDP connection with a source port of 123, it will be blocked while using this AT&T box (PACE 5268AC) in DMZ+ mode. If you have the ability, you can use your own NAT service rule to rewrite the packet to use a non 123 source port (again, destination UDP/123 is totally fine, it's only when the packet leaves with a source port of UDP/123)."