Added basic character controller via importing Starter Assets from Unity.

Assets/Third Parties/Starter Assets/Runtime/Mobile/Scripts/Utilities/MobileDisableAutoSwitchControls.cs

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+/*
+The PlayerInput component has an auto-switch control scheme action that allows automatic changing of connected devices.
+IE: Switching from Keyboard to Gamepad in-game.
+When built to a mobile phone; in most cases, there is no concept of switching connected devices as controls are typically driven through what is on the device's hardware (Screen, Tilt, etc)
+In Input System 1.0.2, if the PlayerInput component has Auto Switch enabled, it will search the mobile device for connected devices; which is very costly and results in bad performance.
+This is fixed in Input System 1.1.
+For the time-being; this script will disable a PlayerInput's auto switch control schemes; when project is built to mobile.
+*/
+
+using System;
+using UnityEngine;
+#if ENABLE_INPUT_SYSTEM
+using UnityEngine.InputSystem;
+#endif
+
+public class MobileDisableAutoSwitchControls : MonoBehaviour
+{
+    
+#if ENABLE_INPUT_SYSTEM && (UNITY_IOS || UNITY_ANDROID)
+
+    [Header("Target")]
+    public PlayerInput playerInput;
+
+    void Start()
+    {
+        DisableAutoSwitchControls();
+    }
+
+    void DisableAutoSwitchControls()
+    {
+        playerInput.neverAutoSwitchControlSchemes = true;
+    }
+
+    private void Update()
+    {
+        Debug.Log(playerInput.currentControlScheme);
+    }
+
+#endif
+    
+}

Assets/Third Parties/Starter Assets/Runtime/Mobile/Scripts/Utilities/MobileDisableAutoSwitchControls.cs.meta

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+  userData: 
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+AssetOrigin:
+  serializedVersion: 1
+  productId: 267961
+  packageName: 'Starter Assets: Character Controllers | URP'
+  packageVersion: 2.0.2
+  assetPath: Assets/Starter Assets/Runtime/Mobile/Scripts/Utilities/MobileDisableAutoSwitchControls.cs
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