Just deployed a new feature, audio can also be shared now! But it's only supported in Chrome and Edge, and users must select the option to share a tab. It won't work for sharing a window or whole screen.
Sorry for the misleading wording, I was trying to say that I'm not paying for any TURN servers. You are totally right, PeerJS is still using TURN server under the hood. Thanks for pointing that out!
I guess you visited the page right after a new deployment. This happens sometimes due to a version mismatch in Next.js after deployment. Refreshing the page should fix it!