Budget: 8000 UAH Deadline: 5 days
Pavel, good afternoon. I am the author of the educational SEO blog YesipovSEO and the SEO Telegram channel SEOgрамма.
The indexing problem can be caused by various reasons. But mainly, it is caused by violations of spam rules regarding Google web search.
For example, if you have a large number of pages with the status "Crawled," but not indexed, or "Found," but not crawled. The problem may also be related to content uniqueness, for instance, if competitors have stretched parts of the text, and because of this, the search may also not index such a page due to the lack of additional value of the content for search.
Feel free to contact me, I will check everything comprehensively and prepare step-by-step instructions for improving indexing. From your side, only access to Google Search Console will be needed.