There is not. A uservoice would be required for this functionality.
And I doubt that would get worked on any time soon.
I had a similar one in for the ban related scopes that is languishing
The optimal approach would be, on the config page as part of setup you would ask the broadcaster to oAuth and grant the permission.
Example:
Then your EBS would retain the token broadcasters token and refresh it as needed
So then your frontend would call the backend and the backend can do the follow check and return that to the front end.
Then you don’t have the viewer double auth. And it’s not nice to be asking the user to leave the page to authenticate externally perodicially to get a token just to check if a user follows the channel. So it’s more optimal to get the broadcasters auth instead
