show more than one category on post slider

Hi there!

I’m working on updating my blog, and I was wondering if there’s a way to adjust the the content shown on the post slider on the home page.

It only allows me to show articles from a same category. But I would love to show an article or edit the cards on the slider, to link to all the categories I have.

Instead of showing 4 articles from a single category, is there any way to create a snippet/or card on each slide to link to a different category?

Thanks in advance! ??

The page I need help with: [log in to see the link]