A new data entity should be created for Reporting currency Adjustment journals to upload adjustments for Reporting currency.

So far, in the current versions, this entity is not existing, and companies must create their own entity or enter the adjustments manually from UI.

Think about this scenario:
Once running "Add reporting currency amounts to fixed asset books" standard process, there will be for nearly all depreciations a difference from the reporting currency between GL and FA as the exchange rate used is not the same.
The exchange rate used for all transactions linked to an fixed asset is the exchange rate used when acquiring it. But in some companies the exchange rate is changing every month.
The only way to have reporting currency amount aligned between GL and FA is to use the reporting currency adjustment journal to adjust GL to be the same as FA.
But if we have 100 fixed assets in a specific company, and 15 months depreciations in the system; there will be about 100 * 15 * 2 (as there is no offset account, 2 lines are needed) = 3000 lines to enter manually pero Legal entity; iamgine 20 Legal entities,.... 60000 lines to be updated manually!

This is not manageable.