Baking results are looking very poor after using different settings

After importing some assets from blender unity store that changed my API I noticed that my baking is going really poorly. After changing these setting it didn’t went away. The only thing I did with this mesh in blender was duplicating its faces en flipping the normal, after that I exported it to Unity. As u can see it is showing dark areas on top while having two baked directional lights shining from above as well ass the mesh being static. I have also reset the player render setting, so I’am using sRGB, gamma. Thanks in advance.

Select the mesh model inside your Project folder and make sure Generate Lightmap UVs is on Unity - Manual: Generating lightmap UVs