AppShell.xaml

<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="MauiShellCustomization.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:MauiShellCustomization"
    FlyoutBehavior="Disabled">

	<Shell.ToolbarItems>
		<ToolbarItem Text="Toolbar 1"
		             IconImageSource="dotnet_bot.png"/>
		<ToolbarItem Text="Toolbar 2"
		             IconImageSource="dotnet_bot.png"/>
	</Shell.ToolbarItems>
	<local:CustomTabBar
		x:DataType="local:AppShell"
		CenterViewText="+"
		CenterViewVisible="True"
		CenterViewBackgroundColor="Red"
		CenterViewCommand="{Binding CenterViewCommand}">
		<!-- <local:CustomTabBar.CenterViewImageSource> -->
		<!-- 	<FileImageSource File="dotnet_bot.png"></FileImageSource> -->
		<!-- </local:CustomTabBar.CenterViewImageSource> -->
		<Tab Title="Tab1" Icon="dotnet_bot.png">
			<ShellContent
				Title="Page1"
				ContentTemplate="{DataTemplate local:Page1}"
				Route="Page1" />
		</Tab>
		<Tab Title="Tab2" Icon="dotnet_bot.png">
			<ShellContent
				Title="Page2"
				ContentTemplate="{DataTemplate local:Page2}"
				Route="Page2" />
		</Tab>
	</local:CustomTabBar>
</Shell>