If you need to hide pages from search results, use the right tool for the job....

https://www.bookmark-help.win/if-you-need-to-hide-pages-from-search-results-start-by-adding-a-noindex-tag

If you need to hide pages from search results, use the right tool for the job. Add a "noindex" meta tag to tell Google to drop the page from its index during the next crawl