Hello, this is totally up to Google, that it will index your page or not. It also depend your page content and crawl budget as well.You can check the crawl budget your website is it good or not. And after that please optimize your page content and add some more content in that particular pages. Also, if there are a lot of pages is getting this issue, you cam use the Google indexing API to index those pages. You can use Python to index those in bulk.