Clearing old Google results boils down to one question: do you control the...

https://www.first-bookmarkings.win/if-you-need-to-scrub-old-search-results-your-first-step-is-checking-who

Clearing old Google results boils down to one question: do you control the site? If it’s your domain, delete the page and ensure it returns a proper 404 error—avoid "soft 404s" where the page looks empty but sends a "success" signal