The site has been indexed, but some pages do not appear in searches at all. It appears when you "Request Indexing" in Search Console, but disappears again after a week or two. There is no manual penalty. What could be the reason? website and problematic pages: https://avto-servis.az/ehtiyat-hisseleri
So many reasons- Google de-indexing your pages due to low-quality or duplicate content, technical issues, or incorrect noindex/robots settings
Request indexing can force temporary discovery, but that doesn’t always mean Google wants to keep the page visible long term. I’d probably check content uniqueness, internal links, crawl paths, and whether similar pages already dominate the query.