Hi ​@HEMA G A 

Can you please check whether the document class of that particular document is  a B2B document class? Also, please check whether the contractor has access to the document class / document revision. Additionally check the status of the document revisions - is it released or ?

Best Regards,

Thilini

 ​@Thilini Kumarasinghe  is correct only released documents in a B2B document class would show up in the B2B in addition to having access for that document.

This is so customers can ensure internal documents(based on the document class) or any documents that are yet to be released would not show up in the B2B side

Hi ​@Thilini Kumarasinghe,

Thanks for the solution.

Hi ​@Thilini Kumarasinghe,

The solution is working fine, If the user is not a part of supplier in the B2B supplier screen.

The solution is not working fine, If the user is a part of supplier in the B2B supplier screen. 
This solution should work even when the user is defined in the B2B supplier screen.