Hi Ismael,
Thanks for your reply first!
I did steps below:
1. I modified loop-index.php as you sent in https://kriesi.at/support/topic/blog-category-frontpage-view/#post-386022
2. I copied parent theme’s files as mentioned in https://kriesi.at/support/topic/blog-category-frontpage-view/#post-397204
3. I added the code you sent me in your last message to functions.php
4. Cleared all cache and CDN
And it worked. What if I would like to do same thing for the tag pages as well?
See you!
Orhan