Upgraded to xcode 13 and now MapKit doesn't seem to be showing user location anymore when it was working fine in xcode12

Question

I'm not sure of the problem here, but I'll post my code below. Basically, I had MapKit running fine in xcode 12, but after the update to xcode 13, MapKit still shows a map; however, does not show a user location anymore. I read the new xcode13 documentation but haven't seen anything about MapKit updates so I can't figure out why anything would change, but would greatly appreciate any help.

import UIKit
import MapKit
import CoreLocation

class MapViewController: UIViewController, CLLocationManagerDelegate {
    @IBOutlet var sideMenuBtn: UIBarButtonItem!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        title = "Map"

        //menu btn tint color
        navigationController?.navigationBar.tintColor = .white
        //Nav bar color
        navigationController?.navigationBar.barTintColor = .black
        
        sideMenuBtn.target = self.revealViewController()
        sideMenuBtn.action = #selector(self.revealViewController()?.revealSideMenu)
        
        
        setupMapView()
        checkLocationServices()
        if #available(iOS 14.0, *) {
            overrideUserInterfaceStyle = .dark
        }
    }
    
    //Declaring the map view
    let mapView = MKMapView()
    
    //Setting up mapview constraints
    func setupMapView() {
            view.addSubview(mapView)
            mapView.translatesAutoresizingMaskIntoConstraints = false
            mapView.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
            mapView.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
            mapView.rightAnchor.constraint(equalTo: view.safeAreaLayoutGuide.rightAnchor).isActive = true
            mapView.leftAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leftAnchor).isActive = true
    }
    
    let locationManager = CLLocationManager()
    
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
            guard let location = locations.last else { return }
            let region = MKCoordinateRegion.init(center: location.coordinate, latitudinalMeters: 4000, longitudinalMeters: 4000)
            mapView.setRegion(region, animated: true)
    }
       
    func checkLocationAuthorization() {
            switch CLLocationManager.authorizationStatus() {
            case .authorizedWhenInUse:
                mapView.showsUserLocation = true
                followUserLocation()
                locationManager.startUpdatingLocation()
                break
            case .denied:
                // Show alert
                break
            case .notDetermined:
                locationManager.requestWhenInUseAuthorization()
            case .restricted:
                // Show alert
                break
            case .authorizedAlways:
                break
            @unknown default:
                break
            }
    }
        
    func checkLocationServices() {
            if CLLocationManager.locationServicesEnabled() {
                setupLocationManager()
                checkLocationAuthorization()
            } else {
                // the user didn't turn it on
            }
    }
        
    func followUserLocation() {
        if let location = locationManager.location?.coordinate {
            let region = MKCoordinateRegion.init(center: location, latitudinalMeters: 4000, longitudinalMeters: 4000)
            mapView.setRegion(region, animated: true)
        }
    }
        
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        checkLocationAuthorization()
    }
        
    func setupLocationManager() {
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
    }
}