//HTML
<ion-tabs>
  <ion-tab-bar slot="bottom">
    <ion-tab-button tab="home">
      <ion-icon name="home-outline"></ion-icon>
      <ion-label>Home</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="search">
      <ion-icon name="search-outline"></ion-icon>
      <ion-label>Search</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="cart">
      <ion-icon name="cart-outline"></ion-icon>
      <ion-label>Cart</ion-label>
    </ion-tab-button>

    <ion-tab-button tab="account">
      <ion-icon name="person-outline"></ion-icon>
      <ion-label>Account</ion-label>
    </ion-tab-button>
  </ion-tab-bar>
</ion-tabs>

//TS
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

import { TabsPage } from './tabs.page';

const routes: Routes = [
  {
    path: '',
    component: TabsPage,
    children: [
      {
        path: 'home',
        loadChildren: () => import('./home/home.module').then( m => m.HomePageModule)
      },
      {
        path: 'search',
        loadChildren: () => import('./search/search.module').then( m => m.SearchPageModule)
      },
      {
        path: 'cart',
        loadChildren: () => import('./cart/cart.module').then( m => m.CartPageModule)
      },
      {
        path: 'account',
        loadChildren: () => import('./account/account.module').then( m => m.AccountPageModule)
      },
      {
        path: '',
        redirectTo: '/tabs/home',
        pathMatch: 'full'
      }
    ]
  },
  {
    path: 'restaurants/:restaurantId',
    loadChildren: () => import('./items/items.module').then( m => m.ItemsPageModule)
  },
  {
    path: 'profile',
    loadChildren: () => import('./profile/profile.module').then( m => m.ProfilePageModule)
  },
  
];

@NgModule({
  imports: [RouterModule.forChild(routes)],
  exports: [RouterModule],
})
export class TabsPageRoutingModule {}