Adding selected items on a page to a separate block

Please help with the implementation of this functionality. I have a separate module with a separate route.

There will be elements on the page (picture and checkbox under it) as in the screenshot.

And when you click the checkbox, the picture should be added to another block below.

I have a module and a file that shows the elements on the page.

app/code/Test/Module/view/frontend/templates/items.phtml

This is the markup of these elements.

    
elements set

            

                

                    
                

            

                

                    
                

Please help with the implementation of the functionality that will add the selected item to a separate block