From your Shopify admin, go to Online Store > Themes.
Find the theme you want to edit and click Customize.
From the top dropdown menu, navigate to Products and select the product template you are using (e.g.,
Default product).In the theme editor's preview window, use the 'Change' option to select the parent product of the bundle you want to adjust.
In the left-hand menu, under the Product information section, click + Add block.
Select the Apps tab and choose Product Page Builder.
Drag the newly added Product Page Builder block to your desired location within the product page layout.
Click Save in the top right corner.