I have the same issue: I would like to show the date of publication of comments on my blog. The problem is that I don’t really understand what I have to take from your example and put into my functions.php and comments.php files because when I copy/paste your code from your zip file, it crashes the changes that I done in my child theme (I work in local for the moment and i customized a lot Activello basic theme).
@vgolovnya To help us keep support thread separates could you please create your own thread for your question here https://colorlibsupport.com/c/activello/ instead of replying on others thread as it makes the thread messy and hard to read.
If you want to you can also add reference of this thread in your newly created thread.
We would be more than happy to help you on your new thread.