When creating a new company code by copying from an existing one, not all G/L accounts were copied to the new company code, the manually created accounts are not copied.
SAP S/4HANA Cloud
Reproducing the Issue
Copy a new company code from SSCUI 100066.
It is standard that when a company code is copied, only the G/L accounts delivered by best practice content are created in the new company code.
You can decide for the G/L accounts you have created yourself whether they should be assigned to the new company code.
As a workaround you can consider to use the Mass Copy function in Manage G/L Account Master Data app to copy the manually created G/L accounts between company codes.
2838220 - Manage G/L Account Master Data - Mass Change Functionality
copy company code, G/L account, multiple copy, Manage G/L Account Master Data, F0731A, mass change, 50, design feature, extend manually, mass , KBA , FI-GL-GL-N , Master Data , FI-FIO-GL , Fiori UI for General Ledger Accounting , Problem