Open Search Console, go to Indexing → Pages, and work through the reasons under "Why pages aren't indexed":
- Excluded by noindex: remove the noindex if the page should rank.
- Not found (404) / Redirect error: restore the page or add a 301 to the closest live page.
- Duplicate / alternate canonical: usually fine; check the canonical points where you expect.
- Crawled or Discovered – currently not indexed: improve the content, merge duplicates and add internal links from indexed pages.
After fixing, click Validate fix and use URL Inspection to request indexing for your key pages. Re-submit your sitemap so Google rechecks everything.
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