Normal Map not working on flipped model

I'm posting here to get some help from people who are experienced with Modding because I am at the end of my wisdom. I tried flipping a statue horizontally to create a matching pair, but the bump map simply refuses to work on it.

I tried the mod with the unflipped model and the bump map works. It even works after flipping the model, importing and exporting again, flipping it back and importing again. But when the model is flipped the bump map just isn't applied. I thought it might be a problem with the blender mirror tool (which creates a massive winding issue and inverts normals as a result), so I wrote a custom Kotlin script to properly flip and fix the winding on an OBJ File. No luck there either unfortunately. Here's a picture of the original statue and the flipped version: Image




I feel like I've exhausted every option and I don't know what to do anymore. Hopefully someone here has an idea.

Thanks in advance  

Edit: Seems it won't load the image off a OneDrive shared link, so I just put it there as an href. Edit 2: I wanted to attach the .package but I don't see the button for that. Maybe I'm just blind. Either way here's a OneDrive link: Package