Add an option to make a component instance a variant of some other main component

I was creating variants of a button component and that included buttons with icons. Later, the page with the button components grew to large so I thought I should create another page and move all buttons with icons there and put them under a different main component say “button-icon”. Now this process had me cut/copying and pasting the icons from the previous page to the new page. In the new page, an instance of the main component was created instead. So now I have to detach the instance…then that is where I got stuck. Since I have a new page created and a new main component, there should be a way to detach them from instance and make them a variant of the main component of my choice as long as the conditions are met i.e. the potential variant can actually become a variant of the main component since they are both buttons vis-a-vis making a card a variant of a button.