If the ATT modem is forwarding WAN port 80 to LAN 180, and the google wifi is connected to the ATT LAN, then you need to tell the google wifi to forward port 180 to your unraid docker IP, not 80.
The info has to make it all the way through and back. Internet port 80 <-> 80WAN ATT moves it to 180LAN <-> 180WAN Google Wifi 180LAN <-> 180 Docker LE 80 to application.
Same thing with 443.
The next device in the chain has to be listening to the correct port, you told google wifi to listen to 80, and the ATT to talk to 180.