Transactions between 2 companies within the same ERPNext Acct

Good Day Everyone.
I have two companies with the same ERPNext account.
Company A is Stock, Manufacturing, Business transactions, etc…
Company B is Business transactions only.

I already put Company B as a supplier for Company A, and I made the Purchase Order from Company A, but The material has not changed in Company B.
How can I link these two companies together as supplier and customer to make a transaction??

This feature is not available for now. After making delivery note from one company, you should also create Purchase Receipt entry in other company.