You're holding out for the feature built by former Facebook ad executives, who started the company Mozilla bought [1] to help advertisers get around Apple's ATT [2], to develop a privacy-respecting standard?
What you describe can be done. But it would need to happen at a public-interest group, e.g. Wikimedia or noyb. Not an ad seller.
[1] https://blog.mozilla.org/en/mozilla/mozilla-anonym-raising-t...
[2] https://www.wsj.com/articles/former-facebook-execs-launch-st...