Gamescope (Steam) Games not appearing at Apps-Dock Widget

### Compositor

Niri

### Distribution

CachyOS

### If Other, please specify

_No response_

### Select your Installation Method

DankInstaller

### Was this your original Installation method?

Yes

### If no, specify

_No response_

### dms doctor -vC

Click to expand
## DMS Doctor Report

**System**
- [ok] Operating System: CachyOS
- ID: cachyos, Version: rolling, Arch: amd64
- [ok] Architecture: amd64
- [ok] Display Server: Wayland
- WAYLAND_DISPLAY=wayland-1

**Versions**
- [ok] DMS CLI: dms v1.5.0
- /usr/bin/dms
- [ok] Quickshell: Quickshell 0.3.0 (revision , distributed by Arch Linux)
- /usr/bin/qs
- [ok] DMS Shell: v1.5.0
- /usr/share/quickshell/dms

**Installation**
- [ok] DMS Configuration: Found
- /usr/share/quickshell/dms
- [ok] shell.qml: Present
- /usr/share/quickshell/dms/shell.qml
- [info] Install Type: System package
- /usr/share/quickshell/dms

**Compositor**
- [ok] niri: 26.04
- /usr/bin/niri
- [info] Active: niri
- [ok] Background Blur: Supported
- Compositor supports ext-background-effect-v1

**Quickshell Features**
- [ok] Polkit: Available
- Authentication prompts
- [ok] IdleMonitor: Available
- Idle detection
- [ok] IdleInhibitor: Available
- Prevent idle/sleep
- [ok] ShortcutInhibitor: Available
- Allow shortcut management (niri)
- [ok] BackgroundBlur: Available
- Background blur API support in Quickshell

**Optional Features**
- [ok] accountsservice: Available
- User accounts
- [ok] power-profiles-daemon: Available
- Power profile management
- [ok] logind: Available
- Session management
- [warn] cups-pk-helper: Not available (install cups-pk-helper)
- Printer management
- [ok] I2C/DDC: 1 monitor(s) detected
- External monitor brightness control
- [ok] qt6-imageformats: Installed (5 formats)
- Formats: WebP, TIFF, GIF, JP2, ICNS (/usr/lib/qt6/plugins/imageformats:/usr/lib64/qt6/plugins/imageformats)
- [ok] kimageformats: Installed (4 formats)
- Formats: AVIF, HEIF, JXL, EXR (/usr/lib/qt6/plugins/imageformats:/usr/lib64/qt6/plugins/imageformats)
- [warn] Terminal: None found
- Install ghostty, kitty, foot or alacritty
- [ok] Network: NetworkManager
- NetworkManager present. Using NM API.
- [ok] matugen: Installed
- Dynamic theming
- [ok] dgop: Installed
- System monitoring
- [warn] cava: Missing
- Audio visualizer
- [info] khal: Not installed
- Calendar events
- [info] danksearch: Not installed
- File search
- [info] dankcalendar: Not installed
- Calendar app
- [info] fprintd: Not installed
- Fingerprint auth

**Config Files**
- [ok] settings.json: Present
- /home/mike/.config/DankMaterialShell/settings.json
- [info] clsettings.json: Not yet created
- /home/mike/.config/DankMaterialShell/clsettings.json
- [ok] plugin_settings.json: Present
- /home/mike/.config/DankMaterialShell/plugin_settings.json
- [ok] session.json: Present
- /home/mike/.local/state/DankMaterialShell/session.json
- [ok] dms-colors.json: Present
- /home/mike/.cache/DankMaterialShell/dms-colors.json

**Services**
- [ok] dms.service: enabled, active
- [ok] greetd: enabled

**Environment**
- [info] QT_QPA_PLATFORMTHEME: Not set
- [info] QS_ICON_THEME: Not set

**Fonts**
- [warn] Normal Font: 'Inter Variable' not found
- Font is not registered. Try running 'fc-cache -fv' or install the font.
- [warn] Monospace Font: 'Fira Code' not found
- Font is not registered. Try running 'fc-cache -fv' or install the font.

---
**Summary:** 0 error(s), 5 warning(s), 30 ok

### Description

Whenever I start a game with gamescope (to prevent niri from shrinking the window) the game is not appearing at the Apps-Dock Widget. However, removing the gamescope will make it appear but this has some issues on my end.

So it would be great of gamescope apps would still appear at the dock so you can click on them. Right now I am forced to Alt+Tab till I get to the game.

### Expected Behavior

Show Icon of game in the dock.

### Steps to Reproduce

Launch any steam game with gamescope parameters.

### Error Messages/Logs

_No response_

### Screenshots/Recordings

_No response_

Reproduce the issue by launching a Steam game with gamescope parameters and compare it with launching the game without gamescope. Start by tracing the Apps-Dock widget's window discovery for gamescope-launched windows. Done means the game's icon appears in the dock and can be used to activate the game.

Written by the indexing model from the issue text.