How to handle unknown error/5xx responses

[fabio-sch]

Hello everybody,
I use orval with client react-query and axios. Also, orval generates hooks for my queries. This way I not only get typed data as well as typed errors. But I wonder, how can I handle errors like a 500 (internal server error). As far as I know, these are not part of the api documentation but may happen. As these are not part of the api documentation, orval does not generate code for that of course and the error type of that query hook consists of the known errors only.

Is there some way to extend the errors with "| unknown" for these cases? What are my options?