[ONEXPLAYER] Device Display Panel Deactivated in Gaming Mode

Hello.

Hope you can help enlighten and fix.

Hardware:
Onexplayer Mini Gundam Edition (Intel i7 1260p), 7-inch panel
Docked, Connected to ROG Gundam (27-inch) Monitor, HDR-enabled
Settings:
Dual OS - Windows default, Then Bazzite KDE Gaming Mode On (like SteamOS)
did script to easily shift from Windows to Bazzite Gaming Mode (Mike 's Tech Tips youtube tutorials)
display config: device display IS POSITIONED BELOW the external monitor (THIS IS IMPORTANT)
Behavior:
device works fine when docked, display is in external monitor, device panel is dark, and device controller works
if device is undocked, device panel is dark, but the buttons work (there are sounds), and when it gets docked, display shows in external monitor again
when docked, if i exit steam, and enter BIG MODE or GAMING MODE, both are displayed in the external monitor
if I position the device display AT THE SIDE of the EXTERNAL monitor in the disoplay config, I am able to play BIG MODE in the device display BUT clicking GAMING MODE again goes to external monitor
in the 10-gamescope-session conf file, i put in OUTPUT_CONNECTOR='*,DSI-1' and expects the gaming mode to transfer to device display when undocked, but it doesnt work

TL/DR: How do I make gaming mode show display in my device panel? :)thanks!