On Google Search Console, make sure you have the menu on the left side open. You can open it by clicking in the top left corner.

Then click on "URL Inspection."

Next, go to your website and click on the specific post that you want to have indexed. Copy the URL for that post, and paste it in at the top of the "URL Inspection" page on Google Search Console.

A little box will come up for a few seconds, saying that Google is retrieving data, and then you will see this (if your post has not been indexed yet) --

A little further down the same page, you may see this --

Or you may see this --

Either way, whether it says "Yes" or "N/A" next to "Indexing allowed?", you can still proceed.