Fetch Contents From Specific Category

Slide Anything is not that kind of slider – each slide in SA has to be individually created, and slides are not auto-generated from post types or custom post types.

You need a post slider – I have written a (premium) plugin to cater for this requirement, called Slide Any Post:
https://edgewebpages.com/sap/

I think there may also be a free plugin on WordPress.org that provides this sort of facility.

It is a premium (paid) plugin.

But you can purchase a free 3-Day Trial License here – so you can play around with the plugin:
https://edgewebpages.com/sap/product/slide-any-post-trial/

After checkout you will be emailed installation instructions, which can also be found here:
https://edgewebpages.com/sap/faqs/

Click on Demo’s on the Main Menu.
You will see 5 demos listed – click on any of the 5 demos and you will be taken to a page showing the demo and instructions/screenshots on how that demo was created.

Note, that this plugin is aimed at the intermediate/advanced WP users, with some knowledge of WP Post Types and WP Queries – this plugin automates these ‘PHP code writing’ tasks.

Another plugin for generating sliders from WP Post Types is:
https://wordpress.org/plugins/post-slider-wd/
This is a very good plugin, not as complicated, but doesn’t have the level customization that ‘Slide Any Post’ has.