I've just got myself an iPhone and tried to install my already registered Garmin Index Scale. It successfully pairs and then asks me to enter my profile details. It even prefills it with my name. However when I try to advance the screen it says "this name is already being used by someone sharing the scale". But I'm the only user who has ever used the scale and it has recorded my weigh history with no problems.
I read one user who successfully installed the scale with Garmin Express on his PC and an Ant Stick - and I've done the same. But when I go to the iOS app on my iphone 12 Mini, I run into the above problem again. Any ideas?