My blog is not in Index and I have no idea what to do. Help Please

So, I had a classic blog on my website. it was located in /blog/ url.
But then one guy told me to delete it so that I would get traffic directly to category links.
So I deleted. But 6 months later I decided to get my blog back. So I have returned it live and started publishing posts.
But then I got alerts from search console that it cannot crawl my blog.
I checked robots and sitemap. Everything is good and nothing blocks the blog url.
I applied that issue is fixed. It did disappear from alerts section. But hell I don't see the blog links in the google index.
Yet, everytime I try to fetch the link in search console it returns me message that Oops! something went wrong...

Any ideas what has happened to my blog URL? How do I make it back to index?

Thank you.

UPD: Hm, I see that one blopost did get indexed. But the problem with all the rest.
I see that /blog page itself and that indexed logpost are in sitemap. While all the rest are not. Is this the problem? Pages are not included in sitemap? That's all? I believe that I can submit a link to index successfully even if it is not in sitemap...

hey, bro check your crawl stats in google search console = Legacy tools and reports = Crawl stats.

mrh4s3eb said:

hey, bro check your crawl stats in google search console = Legacy tools and reports = Crawl stats.

Click to expand...

Thanks for reply. I checked it. Actually don't know what to do with that graph.
But you know what? I did manage to submit my blogposts to google index. And they are submitted after 3d attempt! Lol. Why is that?
However, I believe that I did it earlier and they did not pass the index.

actually, you can see easily see that google bot crawl your website or not. if google bot crawl your website then that issue in your posts if not then try to increase crawl speed.

mrh4s3eb said:

actually, you can see easily see that google bot crawl your website or not. if google bot crawl your website then that issue in your posts if not then try to increase crawl speed.

Click to expand...

Yeah, it is definitely crawled. Will try to increase the speed. Thank you for your advice, buddy., Appreciated.

dont worry, just upload content as normal then do backlinks on it, it will be ok

If all your posts are linked from /blog/ and that single post page also has internal links going further, Google should be able to find all the post pages. But your sitemap seems to be incomplete either way and should be fixed with all posts and submitted for a crawl.

Hm, how do I increase the speed of crawler?
By the way cralwer been to my website 28 September which is before the pages were published.

One more question is this good idea for robots?
User-agent: *
Disallow: /checkout
Disallow: /*?
Allow: /combine/

that's what I have.