It's an important feature we'll likely build in the next year to support larger deployments. Could you share more details about how would you use multiple providers and if there's a suitable work-around today?

I would like to mention that even if it is not a built-in feature yet (as per @ammario's comment), a good workaround can be to use an OIDC provider that has support for federating multiple from SSO sources (e.g Authentik/Keycloak/etc).