I just installed the extension on a fresh instance of vscode.
"Find All References" finds methods outside of the project and even private members of the class.
Is it a feature? 🙂
Tried different ext versions from v1.22.11089 down to v1.15.10535, PHP 8.1.12 and 8.0.14.
You're right - PHP Tools are a bit more optimistic. It always finds everything that looks possible. We'll tweak it a little ... 🙂