Hii,

make a custom model

File: account_general_ledger_currency_patch.p

from odoo import models

class  GeneralLedgerCurrencyPatch (models.AbstractModel):
    _inherit = 'account.general.ledger.report'

    def  _get_columns_name ( self, options ):
        columns = super ()._get_columns_name(options)
        columns.append({ 'name' : 'Currency' })   # Add column title 
        return columns

    def  _get_lines ( self, options, line_id= None ):
        lines = super ()._get_lines(options, line_id)

        for line in lines:
             if  'columns'  in line and line.get( 'level' ) == 2 :   # Line is a move line 
                record = line.get( 'record' , None )
                 if record and  hasattr (record, 'currency_id' ) and record.currency_id:
                    currency = record.currency_id.name
                else :
                    currency = '' 
                line[ 'columns' ].append({ 'name' : currency})
         return lines

Register it in your module

__init__.py

from . import account_general_ledger_currency_patch
__manifest__.py
Make sure it depends on account_reports :

'depends' : [ 'account_reports' ],

i hope it is use full

In default Odoo, The currency name is not included in the Excel file when exporting the General Ledger report, Even though we are using multiple currencies.