Quick answer: Godot 4 Windows export silently producing a binary with default icon? rcedit path missing in editor settings - configure and re-export.
Custom .ico configured in preset. Exported .exe still has the Godot logo.
Set rcedit path
Editor Settings > Export > Windows > rcedit. Download rcedit-x64.exe and point at it. Without rcedit, icon embedding is silently skipped.
Verify post-export
Right-click the .exe > Properties > Details. Should show your icon; default = rcedit didn't run.
Use the export log
Editor > Open Log. Look for rcedit invocation; failure messages are buried but present.
“Icon embedding is rcedit's job. Without rcedit, no embedding.”
Add rcedit to your project README's setup steps. New contributors discover the missing config exactly once; document it once.