I'm Having problems in making a proper UV when I export to fbx, what am I doing wrong?!

FBX File

I’m Having problems in making a proper UV when I export to fbx, what am I doing wrong?!

mark seams, pack all uv

I already solved the problem, I had 2 uv maps (previous one and baked one) when I was exporting to fbx, the textures were coming distorted. I put uv map node and linked to texture in the shading editor, and linking to the baked uv map, and I deleted the previous UV, and problem solved. thanks for your concern anyway.