SwiftUI List EditModel multiple selection seems to have a bug staring on iOS 14.2 - 14.4 currently, to replicated the issue.
Enter List edit mode
Select items
Scroll until selected items are not visible
Scroll back to selected items.
same issue that has screen recording - https://stackoverflow.com/questions/65781022/swiftui-list-cells-not-displaying-selection-state-correctly-after-scrolling
Selecting any option will automatically load the page