I'll start out by saying, I'm not great at spotting yellow belly in combos, especially ones I'm not familiar with but I have been doing a lot of research on it because it's a very useful gene and I've been trying to work more of it into my projects. But this is just my opinion based on what I've learned.
The belly shot would have me saying no yellow belly. It's way too clean and most combos with yellow belly have a checkering on the edges of the belly. Now because this woma is so reduced in pattern, I'm not sure how that would affect this checkering I'm talking about. I did find one yellow belly woma belly shot and it did have the checkering but this snake was not near as reduced as yours so I'm not 100% sure.
The side shot looks promising to me. Yellow belly tends to have yellow speckling working it's way up the sides giving almost a pixelated look. I'd say yours has that but looking at other womas, they all seem to have a bit of this so it's possible it's just the woma giving that look.
So overall, my guess would be no yellow belly. This certainly isn't a sure thing as far as I'm concerned but if I had to guess one way or the other, the belly is just too clean so I'd say no yellow belly.
If I were you, I'd still plan on breeding her with something that would prove one way or the other but could still produce combos you'd be happy with even if the yellow belly isn't present. One thought I had would by an ivory. You'll get ivories if she has yb so she'd be easily proved out but even if she doesn't you would now positively have yb in the hatchlings so you could end up with what your looking for anyway, you'd just need to take some time to grow it out.
Hope that was helpful.
Good luck!