How do I fix this smooth shading?

Hello! I want to smooth shade my model, but this happens…does anyone know how to fix it?


Need more info or better blend sample file.
Mesh imported from FBX?
this is the blend file

i did the mesh myself, so I didn’t import anything

  1. Apply scale to the mesh “Object - Apply - Scale”
  2. Then RMB on mesh - Shade Smooth
  3. and click Auto Smooth in Normals section

    also increasing slightly Auto Smooth value can smooth some edges more
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thank you so much!!