HealthKit conversion issue when asking for permission

Hello, im having trouble making my code work and i keep running into the following error, i dont know how to fix my problem:

Cannot convert value of type 'Set<HKQuantityType?>' to expected argument type 'Set<HKObjectType>'

func healthPermission(){
   if #available(iOS 15.0, *) {
     let healthKitRead : Set<HKObjectType> = [
      HKObjectType.quantityType(forIdentifier: .walkingAsymmetryPercentage)!,
      HKObjectType.quantityType(forIdentifier: .appleWalkingSteadiness)!,
     ]
     if !HKHealthStore.isHealthDataAvailable() {
       print("permission fail")
       return
     }
     healthStore.requestAuthorization(toShare: [], read: healthKitRead)
     { (success, error) -> Void in
       print("Permission sucess")
     }
   } else {
     // Fallback on earlier versions
   }
    
 }

Thanks for any help or advice.