Concerns about why Satoshi Nakamoto IP cannot be found

I’m wondering why I can’t find Satoshi. I know Satoshi made his last post on the Bitcoin forum, but I have concerns about it.

Who registered? If Satoshi did it, why don’t we know his IP? And if he communicated over the internet, why don’t we know his IP?

If he posted on Bitcoin forum and p2p foundation, why don’t we know his IP?

And someone from the satoshi account on the p2p foundation talked about nfts and sent me a link to his opensea collection. Is it really Satoshi or did someone hack his account?