There's a setting in Windows to do that too. OBS can't do anything about that.
I think it's called "Listen to this device" or something like that.
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That could be way off though. Media is inherently technical, with lots of little nuances that all have their own unique ramifications. So a short non-technical description is almost meaningless. Especially if it doesn't understand the terminology and thus misuses it. How close did I guess?