AVM FRITZ!Box Tools, and connected devices

I was quite surprised to see that some of my devices that running on the local network did show up in the Fritzbox integration. So actually those other devices are now listed in two different integrations (FRITZ!Box Tools and the original ones).
See here a Shelly device eg.:

And here the list of all “Fritzbox” devices:

Does anyone have any idea what this doubling is for? Does it makes sense?

I guess that this functionality is caused by the device tracker.

But I don`t see a way to disable it.