Hi I can not connect my HomePod mini because of incompatible wifi. What should I do

Your Wi-Fi router needs to be set up with WPA/WPA2 wireless security and with any client isolation feature turned off.

tt2

The screenshot above indicates an unsecured network, which wasn't going to work. Many older routers may also have WEP enabled, which is now considered insecure. Other names for client isolation are access point or wireless isolation or security. HomePod won't work if there is a challenge response web page required to connect to the network.

tt2

it wouldn’t Work on my iPhone 12 but was worked fine on my iPad Pro 2018 so perhaps not a router issue?

Aren't most routers on WPA2? Couldn’t see the client isolation feature in my routers settings.