macOS WebRTC WebView JavaScript

We are building a system for streaming media based on WebRTC and Mediasoup. As a part of this we need a macOS app to wrap certain functionality. A fully functional web app already exists. Its functionality is to present a number of incoming media streams from
viewers, and to route a single media stream back to the viewers. This should be wrapped into an app, either as a WebView of a remote https link, or as embedded content in the app, whatever is the simplest solution. We already have a macOS xCode project but the part we get stuck on is getting the approval of access to getUserMedia in the app.