Step to verify that the obj export normal does not work.
- Open the file
- Export OBJ with these settings
2a. Click Apply Modifier
2b. Enable Write Modifier
- Import the obj file
What you'd see by following the step: Triangles everywhere as in if you have smooth-shade on. It doesn't look like what's in the file.
Expected : The obj file looks the same or similar to the .blender file.