Hi!
I just wanted to update the thread — I found the solution.
The issue wasn’t in Construct 3 or in the WebView2 export.
What was happening is that Windows/Steam was always trying to launch the Steam version of my game instead of the local exported build, even if I changed the name of the .exe or exported to a different folder.
So every time I tried to run my local build, Steam intercepted the launch and opened an old version that was already installed.
The fix was simple:
I enabled Developer Mode in the Steamworks plugin and added the file:
steam_appid.txt
with my App ID inside the exported game folder.
After doing that, I was able to run my local exported build normally, without Steam redirecting or forcing installation.
So everything is working now.
Thank you!