Here is an example of a scrollable data table with vertical and horizontal scroll and a fixed header. Data design: https://www.sketchappsources.com/free-source/3706-datatable-with-horizontal-scroll-sketch-freebie-resource.html

2 types of modals / popup examples

Snake animation on Nokia. NOKIA 3310 Mockup from: https://www.sketchappsources.com/free-source/3267-nokia-3310-mockup-vector-sketch-freebie-resource.html

Prototype - PUT