When creating a customer or supplier statement of the Transactions type, currency symbols are not shown. For example, the following excerpt from the supplier statements list is from a company with its base currency set as the Euro. The particular supplier is set to GBP:
However, when the statement is viewed, there is no indication which currency is involved:
Statements cannot be exported because they are already presented in a theme format. Exports are for lists. You will notice that you cannot export while viewing invoices, quotes, credit notes, etc.