Hi @holaamy,
I hope you are well today and thank you for your question.
You can link slider slides to pages instead of posts by using the Activello child theme colorlib-child-theme-38.zip shared in the bottom of following topic.
https://colorlibsupport.com/t/using-pages-rather-than-posts-for-flexslider/#post-63863
You have to configure this child theme as described in the following topic.
https://colorlibsupport.com/t/slider-for-pages/#post-33351
Best Regards,
Movin