Can't add accessories to Homekit; says "Apple Home" instead of "My Home Name"
When I try to add a new accessory (tried with all sorts of different accessories) to my home, HomeKit has recently started to pop up with "Add to "Apple Home"" instead of "Add to "My Home"". Then if I continue anyway, it says "Unable to Add Accessory; pairing with accessory failed". My Nanoleaf bulbs are recognised in the Nanoleaf app, but again, trying to add them to My Home presents with "Apple Home" and a failure. So, it's gotta be a HomeKit problem.
I've tried everything, and recently even nuked the whole home network, creating a new wifi SSID and new Apple Home - no luck.
I'm not using HKSR, and I'm not using "smart" router band switching, so I'm out of ideas. I need help because I can't add a thing now (except for HomePods as they don't use a QR code)
iPhone 11 Pro Max