Hey @pimg. The open source team is currently focused on delivering AsnyncAPI support, but OAS 3.1 is tied to some of that work. @ponelat might be able to provide a little bit more detail on the timeline for 3.1 support in SwaggerHub!
Thanks for the question. We don't have a public roadmap for OpenAPI 3.1 just yet, but are actively working on both the roadmap and the underlying tooling. It all starts in the Open Source (ie: Swagger) and then SwaggerHub adopts it. The next thing to look out for is that roadmap which will blog about in https://swagger.io soon.
