Performing this you must enable your dynamic meta tag.
Below are some helpful tips on how to disable a particular posts from indexing on blogger
Login to your blogger account and then select your blog from your dashboard.
Now scroll your mouse to post tab and then click on it, then click on edit button the particular post you want to disable from indexing.
Then click on the custom robot tag at the side bar and un-check the default option
Now click and check noindex the click on the dome button below.
That’s all I hope you his tutorial will favor you.
Don’t forget to drop your comment below thanks.