Screen recording like screen sharing works perfectly fine with PipeWire.
Global hotkeys are also supported perfectly fine. Applications just need to register with the compositor, which will transfer the key press to them. That's the feature working at it should. It prevents applications from hijacking keys when that's not what you want.
The issue is that Discord takes ages to ship anything on Linux and barely supports anything and the Linux community does it's best to keep supporting everything. Other plateformes would have just mandated the new way ages ago and be done with the transition by now.
Global hotkeys are also supported perfectly fine. Applications just need to register with the compositor, which will transfer the key press to them. That's the feature working at it should. It prevents applications from hijacking keys when that's not what you want.
The issue is that Discord takes ages to ship anything on Linux and barely supports anything and the Linux community does it's best to keep supporting everything. Other plateformes would have just mandated the new way ages ago and be done with the transition by now.