Accounting flow queries from FA Corp and Tax book to Primary and Secondary ledger

Hi Team

We have a requirement to create Fixed Asset US corp and US IFRS tax book to be mapped to GL US GAAP primary ledger and US IFRS secondary ledger (difference in accounting method basically) . We have below queries :

1a. In all modules (other than FA) like AR, AP : when we run create accounting, the journals get created in both primary and secondary ledger together (using the subledger conversion). But as per my understanding, for FA module, oracle defined create accounting differently, we run it for Corp book separately and IFRS Tax book separately so it goes to primary and secondary ledger separately , is my understanding correct ?