I've printed with it together with PVA and it worked fine. However, the shape I was supporting was quite basic, a dome shape, so YMMV.
I'm sure it will be added eventually but the nature of the UM3 "eco system" means a ton of testing goes into a material before it gets officially added.
I haven't tried PVA supports with TPU, but I have tried TPU95A + ABS and it works pretty great.
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