I forgot to add the diagnostic information, its #1488866377
Best answer by Ryan S
For anyone new to this topic, if you find yourself with a Play:5 gen2 or other Sonos speaker that can't connect to the network when wireless, but it works just fine wired in, there are a number of things to check, but there's a chance that there's something wrong with the wireless on the device. Run a diagnostic in the Sonos app with the speaker connected to the network using an Ethernet cable. This is under Settings > Advanced Settings.
With the diagnostic number handy, the best thing to do is to get in contact with our support team
directly. They will help identify if there's a hardware issue or something network related that can be fixed, and will assist with the next steps.