How to Enable Screen Mirroring Across Multiple Monitors in Gamescope Session

Hello,

I’m currently using Gamescope on Bazzite GNOME (41) and would like to know if it’s possible to enable screen mirroring across multiple monitors in a Gamescope session. This feature is essential for me because, without it, I can’t capture images from an HDMI/USB capture card. So far, I haven’t found a way to configure this, and I’m unsure if it’s a limitation of Gamescope or if I’m missing some configuration steps.

Has anyone managed to set up a mirrored display in a Gamescope session, or could anyone provide guidance on whether this is feasible? Any help or pointers to documentation would be greatly appreciated.

Thank you!