When I do it with code system it doesn’t work for this page, but the slider itself exists on Home page and the code is written. The other parts such as blogs etc work there, but not slider. Can u pls let me know why?
Sorry you are facing this issue, it would be my pleasure to help you.
Welcome to the Shopify community! 
Thanks for your good question.
Please share your site URL,
I will check out the issue and provide you a solution here.
https://www.hairbuddy.de this is the home page with this slider.
and here is https://www.hairbuddy.de/pages/about About us page where I need to set exactly the sam slider as on Home page, but it doesn’t work somehow. It doesn’t tell me that I use wrong name or something, it just shows nothing if I pasted {% section ‘dynamic-slideshow’ %}