Chaos clusters importing as meshes?

Hey people,
I need to change my whole project to CHAOS destruction, because APEX destruction isn´t working in ue5 (PhysX is unavailable)…

I have added a lot of Destructible meshes in my project, which are using APEX destruction with custom chunks.

How can I add custom clusters for CHAOS destruction, like this at 5:17? [Tutorial] Destructible mit eigenen Chunks - UE4 + Blender [deutsch] - YouTube

Would be nice if someone could help me, I tried everything, but at the current point I think, it´s just not possible… Thank you ^^