Linking Subtopics to Multiple Pillar Pages

Question on the HubSpot pillar and subtopic process. I started a pillar with Supply Chain as the topic, I’ve created subtopics and attached blogs, etc. But then I created a Sustainability pillar topic and created a Supply Chain subtopic that I wanted to attach a blog that I had already attached to a subtopic for the Supply Chain pillar. Am I only able to attach a link/url as a subtopic once? That seems odd. I have a blog on Supply Chain Sustainability that should be able to link to the Supply Chain pillar and the Sustainability pillar…no? Thanks for any clarification.