It definitely looks like it, or at the very least AI-assisted, esp compared to their old art.
This Suisei looks kinda different from their previous Suisei. Their "artstyle" is all over the place. This piece has a weird left arm and two right hands. Left foot has a strange extra crease at the ball of the foot. Feet are kind of mismatched.
Yeah, I call AI too, the arm is backwards and longer than her right, her left knee is missing if you look at the fabric, and the lighting if a bit ood, the lighting is seemingly from above, but her whole right arm is shadowed when it should be lighten too, tho I may be wrong (Edit: I looked back at the parent image, and the metal ankle-lets are now missing on this one and on the first image, the metal bracelet was on her left but now on this one it's on her right hand.)