Adding a slider to the header of my theme

How do I add a slider to the header of a page (to be displayed before the page title)

Give these a plugins a look.

https://www.ads-software.com/plugins/search.php?q=slider

You may need to modify the theme based on whatever plugin you choose. If you do choose to do that then make sure you create a child theme first.

https://codex.www.ads-software.com/Child_Themes

I can’t give you specific advice because that’s a commercial theme (we don’t support those here) and more importantly I’ve never used a slider plugin myself. ??