SAP Business ByDesign system setup is that the user creates new Account and Supplier directly and without anyone`s Approval. Your requirement is to set Approval process for new Account and Supplier.
There is no Approval process for the Master data Business Partners. The Business Partners do not have Approval Status conditions. Further, there is no Approval process for Suppliers.
Your requirement is not possible in SAP Business ByDesign system.
KBA , SRD-CC , Cross Components , How To