Same here.For whatever reason, owners seem to be experiencing different levels of battery degradation.
I don't have any third party software information to go by, only what the UI tells me.
I also always run my display such that the battery %SOC is always showing.
I'll only confirm my degradation via the 100% rated range once a year, when I'll top the car up to 100% and it no longer accepts a charge AND it is in July (warm battery).
When my car was new (01 Jun 2018) and I checked it's range out once that summer (July 2018) it showed 499 km.
Last July it showed 498 km...
I figure it will probably show somewhere around 480 km this July, based on what other folks are seeing.