I tried to add access all inventory reports to a original role "Standard limited customers and suppliers", but I can't. All inventory reports are not able to add to both original and custom role!!

And when I tried to another original role "Account receivable manager", the results was same.

The only thing I can try is making custom reports with inventory reports and "Shared", but the users only see the list of the shared inventory shared reports, not the body of the reports!!!