Split-pane not displaying menu on mobile

Desktop view:
image

Mobile View (Menu is missing):
image

<ion-app>
  <ion-split-pane>

    <ion-menu type="overlay">
      <ion-header>
        <ion-toolbar>
          <ion-title>Menu</ion-title>
        </ion-toolbar>
      </ion-header>
      <ion-content>
        <ion-list>
          <ion-menu-toggle auto-hide="false" *ngFor="let p of appPages">
            <ion-item [routerDirection]="'root'" [routerLink]="[p.url]">
              <ion-icon slot="start" [name]="p.icon"></ion-icon>
              <ion-label>
                {{p.title}}
              </ion-label>
            </ion-item>
          </ion-menu-toggle>
        </ion-list>
      </ion-content>
    </ion-menu>

    <ion-router-outlet main></ion-router-outlet>

  </ion-split-pane>
</ion-app>
  "dependencies": {
    "@angular/common": "^7.2.2",
    "@angular/core": "^7.2.2",
    "@angular/forms": "^7.2.2",
    "@angular/http": "^7.2.2",
    "@angular/platform-browser": "^7.2.2",
    "@angular/platform-browser-dynamic": "^7.2.2",
    "@angular/router": "^7.2.2",
    "@ionic-native/core": "^5.0.0",
    "@ionic-native/splash-screen": "^5.0.0",
    "@ionic-native/status-bar": "^5.0.0",
    "@ionic/angular": "^4.1.0",
    "@ionic/storage": "^2.2.0",
    "core-js": "^2.5.4",
    "lodash": "^4.17.15",
    "moment": "^2.24.0",
    "rxjs": "~6.5.1",
    "tslib": "^1.9.0",
    "zone.js": "~0.8.29"
  }

That never truthfully opened it by default on the phone, you have to use a menu button so you can open it or you can slide it to the right

See the docs split-pane

What I’m missing is the menu Icon (Burger) in the header.