Scale text - .NET MAUI
In mAUI, all controls that display text automatically apply font scaling. The scale is based on the font size preference set in the Android or iOS operating system.
By default, .NET MAUI apps use the Open Sans
font on each platform. However, this default can be changed by registering additional fonts in your app.
You can find additional guidance in the .NET MAUI fonts article.
<Label Text="Appt"
FontSize="18"
FontAutoScalingEnabled="True"
FontFamily="Custom" />