Okay, since I haven't heard from anyone, going on to another outfit. I'll let you guess the name - comes in two part, skirt and corset. I initially though to leave the corset alone (tight-fitting) but I've grown lazy about dialing morphs, so i thought: why don't you morph the boobs so they look like they've been squashed in the confines of a corset, then let dynamics do the rest?" I know, sounds a bit weird, but hey, why not? right?

So, this time, I've give more of a blow-by-blow of what I'm doing. First, i loaded the corset the conventional way... but did not conform it. On the default V4 in zeroed position and zeroed morphs (sorry Steve, still playing with girl dolls, here ) the item loads with no poke-through anywhere. Ideal. Exported as Wavefront obj (single frame) with only the corset ticked - unticked everything else, including GROUND... you can do that quickly by just ticking the Universe box - and in Export Options, tick on:
[x]Weld body part seams
and
[x]Include body part names in polygon groups

If anyone can tell me if that's correct or if I'm missing something, I'd really be in your debt.

Saved it as corset.obj

In Blender, the names didn't carry over, in a sense - the two parts of the obj are called Mesh and Mesh.001. When you click on one or the other of the parts, you'll see the poser names under Object Data - little upside-down triangle). And all the material zone names have been preserved under Material (circle that looks like the nuclear material warning). Cool.

Just going to export this as Corset1.obj and see how it sims.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks