in your custom module create a function 

class AccountMove(models.Model):
    _inherit = 'account.move'
   
    def your_function_name(self):
        bill = [
            ('ref', 'ilike', self.name),
        ]
        return str(self.env['account.payment'].search(bill, limit=10).journal_id.name)

and in your invoice report which might template_id = report_invoice_document

you can mention this code 

which will give you the payment method through which it was done

                <!--<t t-set="any_name" t-value="o.your_function_name()"/>
                <span t-esc="any_name"/>

through this you can see which payment method it was and then you modify it the way you want