Cleaning up old search results depends entirely on who controls the site. If...

https://www.bookmark-help.win/if-you-need-to-clear-old-embarrassing-or-inaccurate-search-results-the-right

Cleaning up old search results depends entirely on who controls the site. If you own the page, delete it or return a 404 error, then use the "Removals" tool in Search Console for a quick fix