Search Engines uses Web crawler, spider, or search engine bot to download and index content from all over the Internet. The goal of such a bot is to learn what (almost) every webpage on the web is about, so that the information can be retrieved when it's needed.

The schedule for webcralwer can vary from 3 days to 4 weeks and hence the changes made during a period might not be reflected in the searches. This said, you could request manually for search engines to crawl your webpages.

Please review the below link from Google regarding this
https://developers.google.com/search/docs/crawling-indexing/ask-google-to-recrawl

Make sure that Robots.txt information is configured in the website settings on the back-end.