Solved:
It is a bit unclear about what’s up with the LED ring…
This is what Emile says about it:
In English:
“That is not entirely true. You can show LED Ring effects via a Flow, but we only have disabled the LED Ring control for apps.”
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Exactly what is the most useful part of the ring, letting an app control it dynamically (such as current power usage, weather etc)
Yeah, i already edited my post about that.
But good news that the userdata is being kept!
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Well, i use it for a lot, but my best usage: The LED-ring shows (by color) which trash-bin/container needs to be put to the street.
That way everyone knows it when a container needs to be put out to the street, without anyone getting a textmessage f.i. and they need to tell the rest of the family.
I think Emile means you can use flows to create ledring fx, but the apps cannot control it by themselves, via build in commands so to speak.
I by the way didn’t know apps could control the leds by themselves, I never had a ‘ghost’ ledring 
I thought that Apps no longer can create screensavers, like the Ring-Collection app does.
Or that they cannot start Annimations (almost the same as a screensaver) any longer.
But time will tell.
