Purchase orders are not showing up in isupplier portal

we created an Purchase order but the PO are not showing up in isupplier portal.

the required setup for isupplier are done, we are able to open isuuplier but it does not show the Purchase order or any other PO, of the supplier or supplier contact.

Does isupplier require separate license to use ? is this the reason why PO are not showing up in isupplier portal.

Please guide