There is no way of making Notas Fiscais visible within C4C.
SAP Cloud for Customer
Notas Fiscais is not supported in C4C.
Cloud for Customer does not have the option to make Notas Fiscais available as standard. This is the expected system behaviour.
SAP Help Portal: SAP Electronic Invoicing for Brazil
KBA , AP-GLO-NFE , GLO - Nota Fiscal , LOD-CRM-OPP , Opportunity Management , Known Error