New issue by marcschulze98 on void-packages repository

https://github.com/void-linux/void-packages/issues/31274

Description:
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### System

* xuname:  Void 5.12.8_1 x86_64 AuthenticAMD uptodate rrrmFFFFF
* packages:  kwin-5.21.5_1 plasma-workspace-5.21.5_1

### Expected behavior
Screensharing in KDE should work under wayland in applications such as firefox and obs.
### Actual behavior
Screensharing doesn't work
### Steps to reproduce the behavior
- Build plasma-workspace and kwin with the pipewire build option enabled
- Restart KDE
- Open firefox, navigate to https://mozilla.github.io/webrtc-landing/gum_test.html and click on "Screen capture"

### Additional info
- I know that pipewire is working *somewhat* because after enabling the build options I have working window previews (previously they were just empty boxes when I hovered over them).
- Pipewire works fine for me as an audio Server
- I have pipewire, pipewire-pulse, pipewire-media-session and xdg-desktop-portal-kde running
- when running "xdg-desktop-portal-kde -v" in a terminal I get the output `zkde_screencast_unstable_v1 does not seem to be available` when triggering screensharing in obs or firefox.