Question, Importing fbx file to substance

Hi all, I hope you're well.

I'm having an issue, when I import my my .fbx file from 3ds max into substance painter the texture sets for my model are not showing.

They did show after importing on a previous occasion but this time round they are not. I have multiple parts to my modelf IG-88 driod. I have spent a long time trying figure it out.

The texture set list just shows 1001 for the full model.

Any help would be appreciated have a great day/week.

Thanks