How to reproduce:
1. Create a new Unity project and install the Multiplayer Tools package
2. Go to Window -> Multiplayer -> Multiplayer Tools
3. Click "Add to Scene" for the Network Simulator (or Runtime Network Stats Monitor)
4. Click "Add to Scene" again for the same tool
5. Observe the Hierarchy
Expected results: Clicking "Add to Scene" when an instance already exists in the scene should notify the user or select the existing instance instead of creating another one
Actual results: A new duplicate GameObject with the component is created every time, with no limit and no detection of the existing instance
Reproducible with: 2.2.0 (6000.7.0a6)
Reproducible on: macOS Tahoe 26 (M1), Ubuntu 24
Not reproducible on: No other environment tested
Note: Not filed as a known issue; no existing scene-uniqueness check was found for either component