Hello Aigars.
Fists of all, i wanna say thank you for free wonderful theme :).
Secondly, i have similar problem with making silder on all pages.
I want to make fixed slider from some pictures, not from category. So, i follow your instruction at https://colorlibsupport.com/t/static-image-on-front-page/ by adding code slider into front-page.php.
Then, i want to this slider appears on all of page. So, i follow you instruction in this topic. I remove [is_front_page() &&] from [dazzling_featured_slider] function inside extras.php file.
But it not work.
Can you tell me if i do something wrong, or help me to find a solution for my problem. Thank you!