IOT devices can't be setup, out of the box, using iOS 13.6, 13.5 works perfectly, when required to directly connect to IOT device wifi.
It seems that wemo dimmers can't be set up on iOS 13.6, but they can be setup fine with iOS 13.5. I also found the same thing with my LG wifi washer/dryer. Looks like maybe iOS 13.6 has some security around connecting directly to IOT devices to perform initial config. I also tried iOS 14 beta but no luck there either (someone else here did have luck with that version).
I noticed that when you connect to an IOT device that iOS settings show you connected, but the wifi icon does not show up at the top of the screen in the status bar. Is there any way apple can fix this?
I was lucky to have an old device that I hadn't installed iOS 13.6 on, otherwise I just wouldn't be able to set up my new dimmer or washer/dryer????
This is more an iOS discussion, but I couldn't find general iOS, so put it for iPhone....
iPhone 11 Pro