Do you have a source of reference about this?
I can’t seem to find any online sources directly talking about what engine the game uses. However, given how Tri-Ace used to develop their own in-house techs, I would lean towards the latest iteration of their Aska engine.
If it’s made from Unreal, it should contain at least related licenses. If someone owns a pc version, I guess simply check the naming in the crash report should give enough clues.