tested build on iOS

Assets/XR/XRGeneralSettings.asset

 %YAML 1.1
 %TAG !u! tag:unity3d.com,2011:
+--- !u!114 &-6397711319103511354
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: f4c3631f5e58749a59194e0cf6baf6d5, type: 3}
+  m_Name: iOS Providers
+  m_EditorClassIdentifier: 
+  m_RequiresSettingsUpdate: 0
+  m_AutomaticLoading: 0
+  m_AutomaticRunning: 0
+  m_Loaders:
+  - {fileID: 11400000, guid: 96f0bfd736bfe1f41af3efa5fb3ba70c, type: 2}
 --- !u!114 &11400000
 MonoBehaviour:
   m_ObjectHideFlags: 0
   m_Script: {fileID: 11500000, guid: d2dc886499c26824283350fa532d087d, type: 3}
   m_Name: XRGeneralSettings
   m_EditorClassIdentifier: 
-  Keys: 07000000
+  Keys: 0700000004000000
+  - {fileID: 6720149362992132025}
 --- !u!114 &207803842820362116
 MonoBehaviour:
   m_ObjectHideFlags: 0
   m_AutomaticRunning: 0
   m_Loaders:
   - {fileID: 11400000, guid: 0c19e39739c45c242880925a143b853c, type: 2}
+--- !u!114 &6720149362992132025
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: d236b7d11115f2143951f1e14045df39, type: 3}
+  m_Name: iOS Settings
+  m_EditorClassIdentifier: 
+  m_LoaderManagerInstance: {fileID: -6397711319103511354}
+  m_InitManagerOnStart: 1

ProjectSettings/GraphicsSettings.asset

   - {fileID: 16000, guid: 0000000000000000f000000000000000, type: 0}
   - {fileID: 16001, guid: 0000000000000000f000000000000000, type: 0}
   - {fileID: 17000, guid: 0000000000000000f000000000000000, type: 0}
-  - {fileID: 16003, guid: 0000000000000000f000000000000000, type: 0}
   m_PreloadedShaders: []
   m_SpritesDefaultMaterial: {fileID: 10754, guid: 0000000000000000f000000000000000,
     type: 0}