You’ve done the right thing by coming here of all places, at the beginning of your (alleged) hair loss. Your crown looks normal. All the hair on the scalp originates with the crown embryologically, and radiates in a spiral from the middle of it. Because the hairs naturally splay out from each other, it is typically the most transparent area of the entire scalp - if you take a comb or your fingers and spread your hair at the front you’ll see scalp too. That’s what the crown is like.
To be sure, the best thing you can do is post photos of your crown from before the alleged thinning, when it was fuller, if possible. But I suspect that it has always been like that. The photos you’ve posted already are great quality.
If you could also post quality photos of the hairline it would help too.