Hello Abdul Jabbar,
This is definitely possible but will require some configuration, enterprise assignment and master data maintenance under the new company code. Master data includes: GL Accounts, Materials, Customers, Vendors, Assets, Banks..etc.
For FI-MM Integration configuration, it depends on how the configuration was made, we have it possible to create a single Valuation Group using same GL Accounts of the Chart of Accounts assuming both companies using the same GL Accounts.
Thanks.
Reda Diab