Hey there @TristanAVR! Welcome to the community! So you won’t be able use pure collisions for checking the morph target hits. Though if I remember correctly, you could check your vertex positions, as I do believe their movement is actually read when MTs are active.
Here’s a thread showing off how to get the SKM vertex positions with some custom code:
Hope this helps! Let me know how it goes, I’m interested in the outcome!