Hi @pali47,
For your information, you can link any two products of any types (Smart Bundles, Smart Composite, Smart Grouped, Simple, Variable, etc.) by attributes using WPC Linked Variation for WooCommerce plugin. You will need to create a new common attribute for both bundles under Products >> Attributes, then configure 2 terms, ie. Bundle 01 & Bundle 02. Then go to each bundle, open the Attributes tab, add the corresponding term to each of them. Install the WPC Linked Variation plugin, then go to Linked Variations under WPClever menu, create a new one and put a check on the newly create attribute. Now, when you go back to each bundle page, it will show like this: https://www.screencast.com/t/sRDQKRds27K8
Here is the documentation for your reference: https://doc.wpclever.net/wpclever-all-wpc-plugins/wpclv/
Regards,