Here’s the official answer:
Unfortunately, we do not support an integration with Stripe. However, you can try using the rule to create stripe user and persist the stripe ID in the user_metadata or app_metadata object. Then, you can add the stripe ID in the ID token as the custom claim. The following community thread has got an example.
Using Stripe as payment platform and link account to an Auth0 user. - #3 by md.reeves. But keep in mind this would be entirely custom and not supported by Auth0.