Access Steam features in the Windows WebView2 and Linux CEF exporters. Requires r407.2+ for Windows and r412+ for Linux.
Please contact Valve for support with the Steam Overlay - it's implemented entirely by Steam and completely out of our hands, there is virtually nothing we can do to change how it works ourselves.
Sure, I will contact them, thank you very much.
Could you just confirm that I'm doing everything right?
1. Leave the developer option unchecked, and the overlay checked, and put my game ID
2. Create an action using Steamworks->Unlock Achievment with "achievement name"
3. Export as Webview2