In May 2022, Stripe received a payment institution license in Brazil, and since then, it is no longer required to issue electronic invoices to its account holders. This means you will not receive the NFS-e for fees paid to Stripe (starting with fees for May 2022).
For your convenience, the information previously available on the invoice can still be found on the Dashboard, in the Financial Reports area. On this page, you will find the Balance > Change in Balance after Activity > Other Stripe Fees report, where you can select the desired period and download a report with the amount paid in fees.