Changed URL Not indexed

I created a post on a website year 2017 and i changed the URL name 2 times one week back. i did add new URL to search console as well. but still i can't find the URL index on google. how to fix this issue or is it take more time to get index again.

Thank you people

Try to post some links on social media and other quality blog comment, if your content quality of this post is high, it will index.

I have no idea if you need set 301 redirect to new URL or not...looking for the expert's answer.

If your post is showing live with previous URLs then you need to setup 301 permanent redirection method & take them to the newer URL.
You need to check the links with previous names or use some tools to check their HTTP Status Codes. If all the links are showing 200 then it may be a problem for the New URL to get indexed. Removing the older links from Sitemap & Adding newer one is also the solution but I'll unable to describe the perfect reason like this. In fact, DM me your all the previous links with newer one so that I can look further to help you out.