Hey there @Katianie! So there isn’t a workflow for upgrading a project from Apex to Chaos, and since Chaos destruction works a bit differently there aren’t always 1:1 analogous classes between the two. It’s been a while since I had worked with Apex, but I believe the closest would be UGeometryCollectionComponent.
That said. you may be able to compare their API pages to streamline the process if you’re making a porting utility: