/category/ on Child Categories!

This post from Google>>Chrome child category;
https://google.allversions.net/chrome/this-post-from-chrome-child-category/
it is working.

Parent cat is google;
https://google.allversions.net/
it is working.

Child cat is chrome;
https://google.allversions.net/category/chrome/
it is working.

But i would like this;
https://google.allversions.net/chrome/
it is not working.

Is it possible?

OR

Please comment, How should I do this.

https://www.ads-software.com/plugins/main-category-as-subdomain/