Hello
I wonder why this is happening on my osclass blog plugin posts firstly i was not seeing any problem and the posts were crawled and indexed within few days now it has just become like a lucky game Now some posts are indexed and some arent even crawled by google bot even if i request indexing from the url inspection tool so frustrating as to why this is happening and the sitemap just works fine.
Some posts are indexed and some are not even if i request indexing

Use google tools to verify site is indexable..if it was crawled by google, you should see status of page in console (if it is or is not indexed)