Half of object is transparent

I created a ribbon to go around the tail of my model. Half of the ribbon is visible and the other half is transparent in unity. I tried to add a second layer, but it didn! 't help. I know changing the shader fixes it, but its for a quest user. In Blender, there also seems to be an issue with the shader. Screenshot 2021-02-26 023641 Screenshot 2021-02-26 023658

Looks like your faces are inverted in that area, blender usually doesn’t show this too well.