When you create a bundle product with a Tee and Pant, customers will need to select the color and size for each item individually, as shown below.
However, you may want the Tee and Pant to share the same color selection, as shown below.
This document explains how to achieve that effect.
Select the bundle template shown below.
For Bundle Assembly, choose “Add Options from selected products”, as shown below.
Select the products you want to add to the bundle, such as a Tee and Pant. Note: Please make sure to select all products in the bundle before clicking the Confirm button.
Delete the Color option from either the Tee or the Pant, as shown below.
Then, rename the remaining Color option to a suitable name, such as "Color", as shown below.
Enable Color Swatch. Select Color as the variant option, and adjust the color swatch settings according to your needs.
Save bundle.