Well the car has done 50,000km before I bought it and tbh in the winter it lost quite a bit of range (I've had a different EV previously and its range didn't decrease as much during the winter). The car has a warranty on the battery valid for 8 years or 160,000km (whatever occurs first), the manufacturer promises it will have 70% or more capacity at that point.

ADAC did a test with a vehicle that reached 160,000km and its battery was at 91%.

I roll my eyes at this question because it's often framed as good faith curiosity, but it's often asked in bad faith by people that think it's a "gotcha" question, because they have this incorrect notion that EV batteries need to be replaced frequently. They see the warranty is 100K miles/8 years or whatever and think that means they have to replace the battery after 100K miles/8 years, yet fail to recognize that they don't apply that same logic to combustion engines with 30K mile/3 year warranties.