After creating your Bundle As a Product, you can change the URL by following these steps:
1. Click on your bundle
From the Bundles section, find your bundle as a product and click on it to edit it.
2. View on Shopify
Click on "Edit product on Shopify" on the upper right corner of the Edit Bundle page. The product will show up on the Shopify panel.
3. On “Search engine listing” click "Edit".
4. Change URL and Save
You can now change the URL in the “URL handle” section.