Spring Cloud Config How does the Spring Cloud Config Client & Spring Cloud Bus work with Project Reactor?

I'd like to understand how Spring Cloud Config Client & Spring Cloud Bus work with Project Reactor? Are they reactive, or synchronous even for reactive applications? If so, I'd like to request reactive support as a feature request.

Comment From: ryanjbaxter

Config clients may use WebFlux.

Bus does not use Project Reactor at all and is using Spring Cloud Stream, I dont see why it would need to use Project Reactor.