Replacement for OAuth2FeignRequestInterceptor from spring-cloud-security?

Is your feature request related to a problem? Please describe.
For my Feign Clients I need to add an RequestInterceptor which enhances the requests with an OAuth Bearer Token. I still use the OAuth2FeignRequestInterceptor. But it simply states @deprecated will move to Spring Cloud Openfeign in next major release

I need quite it's features as the oAuth provider Auth0 requires a non standard attribute "audience" - so I configure the interceptor with customized versions of DefaultOAuth2ClientContext, DefaultAccessTokenRequest, DefaultRequestEnhancer, ClientCredentialsAccessTokenProvider (which themselves all get @Deprecated - but the Migration Guide doesn't really help me yet)

Describe the solution you'd like
A 1:1 replacement for the OAuth2FeignRequestInterceptor
or an equivalent which can handle additional attributes in the token request needed for Auth0 ("audience").

Describe alternatives you've considered
I stay with the deprecated OAuth2FeignRequestInterceptor and ignore all the Warnings in the logs and IDE 👎

Additional context
There is also a question on StackOverflow addressing this issue from somebody else - but no answers or ideas yet.

Start by reading the deprecated OAuth2FeignRequestInterceptor in spring-cloud-security and the referenced OAuth client classes: DefaultOAuth2ClientContext, DefaultAccessTokenRequest, DefaultRequestEnhancer, and ClientCredentialsAccessTokenProvider. Review the OAuth 2.0 Migration Guide and the existing issue discussion first. Done means documenting or providing a supported replacement that preserves Feign bearer-token behavior and supports Auth0's audience attribute.