Instead of the local player seeing the simulated cursor object, they will now instead see just their actual cursor with the same image, to cover up the visual lag a bit. (They can still see the lag happening with the click particles, which should still demonstrate the point.)

Assets/Art/Icons/CursorIcon.png.meta

     externalNormalMap: 0
     heightScale: 0.25
     normalMapFilter: 0
-  isReadable: 0
+  isReadable: 1
   streamingMipmaps: 0
   streamingMipmapsPriority: 0
   vTOnly: 0

Assets/Scripts/Netcode/PlayerCursor.cs

                 var trails = m_onClickParticles.trails;
                 trails.colorOverLifetime = new ParticleSystem.MinMaxGradient(Color.grey);
             }
+            else
+            {   m_renderer.enabled = false; // The local player should see their cursor instead of the simulated cursor object, since the object will appear laggy.
+            }
         }
 
         [ClientRpc]

ProjectSettings/ProjectSettings.asset

   accelerometerFrequency: 60
   companyName: Unity
   productName: Game-Lobby-Sample
-  defaultCursor: {fileID: 0}
+  defaultCursor: {fileID: 2800000, guid: 9367b4ce9024f5b4090fabc2941d2116, type: 3}
   cursorHotspot: {x: 0, y: 0}
   m_SplashScreenBackgroundColor: {r: 0.13725491, g: 0.12156863, b: 0.1254902, a: 1}
   m_ShowUnitySplashScreen: 1