Hi Welcome to anvil! 
A search in the search bar for “Drag and Drop” found this forum post as the top result:
It is pretty complicated and might not be beginner friendly, but someone towards the bottom of the thread someone asked about using it for repeating panels instead of cards.
If you are new to anvil, you might need to learn some more about how components work if you want to use this.
If you have been using anvil for a while, it should be much easier to use, and even contains a clone link.