I have had a similar issue with steam where the issue was the wayland backend. check out the following link and see if this helps you solve your issue:

https://bbs.archlinux.org/viewtopic.php?id=309757

Also, may be helpful to run Hero from the terminal and see if there are any errors being output there when you run the game.

I think you’re getting there. At least on the right track. According to AI search results:

Method 1: The Gamescope Approach (Recommended)

1. Install Gamescope: Ensure gamescope is installed on your system (e.g., sudo pacman -S gamescope on Arch/Hyprland).

2. Configure Heroic Games Launcher:

   • Open Heroic and go to Settings > Game Defaults.

   • Scroll down to the Gamescope section.

   • Enable the option to use Gamescope.

   • You can define additional parameters like --width 1920 --height 1080 -f to force fullscreen and your desired resolution.

3. Configure via Steam: If you add Epic Games to Steam via the Heroic integration, right-click the game > Properties > General, and under Launch Options, add:
   gamescope -W 1920 -H 1080 -f -- %command%
   (Replace with your native display resolution).

Method 2: Enabling Native Wine/Proton Wayland Drivers

Recent versions of Proton and Wine (including GE-Proton) feature native Wayland drivers which drastically improve latency and frame delivery.

1. Open your specific game’s settings in Heroic Games Launcher.

2. Under the Other / Advanced tab, find the Environment Variables section.

3. Add a new variable to enforce the Wayland driver:

   • Key: SDL_VIDEODRIVER

   • Value: wayland

4. (Optional) Add a second variable if you are experiencing mouse input issues or to force Wayland directly for Wine:

   • Key: WINE_SIMULATE_CURSOR

   • Value: 1

Still not working