Google nest thermostats (Near Chelmsford Center)

2 Google nest learning thermostats gen 3. and 1 Auxiliary room sensor - they work fine as thermostats , we just got kicked off our wifi on one and couldn’t get back on. Unsure if this is a hardware issue or a problem on our end. Either way, still functional as thermostats! Porch pickup only in Chelmsford - serious inquiries only.