How does Tyk support GraphQL subscriptions?

Couldnt find any documentation where how Tyk support GraphQL subscriptions? Is it via WebSockets? If so how does the rate limiting applies to GraphQL subcriptions? The online documentation states that API level query depth rate limiting applies to queries and mutations only.

Hi

Subscriptions are still pre-GA and will be available alongside full GraphQL Federation in Tyk in version 4.0 due out this quarter.

Initially they will work over websockets - there is no rate limiting strategy for websockets yet to my knowledge but will check with the team.

Thanks!