Revolut Trading - how to change the Default Tax Lot Disposition Method ?

I can see in my monthly Revolut Trading Account Statements:

IMPORTANT INFORMATION
Your Default Tax Lot Disposition Method is: First-In, First-Out

In the country I reside in, the gain calculation method for tax is the average-cost method, not the First-in, First out method.

How can I change my default Tax Lot Disposition Method, and get the statements that use the method more relevant to me?