Unusual battery degradation?

Hi I’m looking to buy a 2023 model 3 LR. It’s got 30k kms (18k in bald eagle units). I’m worried about the 88% battery capacity though.

I’ve read up on it and know people say 5-10% in the first few years is typical when people asked on forums. But their cars typically had 2-4x the milage although the same year. The same seller (he repairs and sells) has another ‘23, with double the mileage but the battery health is in the low 90s which makes me even more unsure if 88% is normal or excessive. Just wanted to double check before buying. Thanks