Hub & SpeakerHub Troubleshooting
Eero users, can't connect SpeakerHub or Hub to WiFi

Eero router users can temporarily turn off the 5 GHz band, which may be needed to connect your SpeakerHub to your WiFi.
https://support.eero.com/hc/en-us/articles/360049983772-How-Do-I-Temporarily-Hide-the-5GHz-Band-on-My-eero-Network-