Style and Design: Displaying variants on the Bundle page
You can certainly add products which display multiple variants (in the backend) and then customers can then select all available variants from a dropdown on the bundle page.
Alternatively, you can add single variants of a product to the bundle page - whichever suits.
Set up your products here:
2) Apps > Bundle Builder
3) Choose your bundle
4) Under “products” click “edit"
5) When you add a product with variants, you can either choose to display all of these, or select one from the dropdown:
A combination of the above can be achieved if needed.