Here’s four examples of others who tried this and found the event handlers and other code doesn’t copy. They all use the innerHTML method I suggested in the post New App Design Considerations Part 7 - Copying HTML. And they all redefine the events after the paste. None of them tried to use BS4 controls, nor could I find a post with BS4 controls and SPA routing.
A new approach is needed. I’ll update New App Design Considerations Part 7 - Copying HTML when I determine a better solution to HTML “templates” in AS.