Can you not do this?

HideSoftInputOnTapped="True"

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             ios:Page.UseSafeArea="False"
             NavigationPage.HasNavigationBar="False"
             xmlns:telerik="http://schemas.telerik.com/2022/xaml/maui"
             xmlns:ios="clr-namespace:Microsoft.Maui.Controls.PlatformConfiguration.iOSSpecific;assembly=Microsoft.Maui.Controls"
             HideSoftInputOnTapped="True"
             x:Class="EarthPlatMaui.MainPage">