I was wondering how blockchains lost tokens.

What I mean is, lets say someone loses a private key, or the JSON, or something else happens.

The coins inside that wallet, on every chain, they are officially lost, is there a way for chains to verify that?

They will never be used, or transferred. Would there be a way for an audit to verify that and effectively reduce the amount out there on the chain?

I understand the difference between total tokens and "active" tokens, but it is kind of pointless to factor those in anymore.