Label and icon in TitleView with default platform style

Hi everyone,

I am making a custom NavigationPage TitleView which can receive an icon, a label with the title, and another icon to access a searchbar which will make the searchbar appear in the TitleView.

But when the searchbar is not visible, I want the text to have the same style as the default navigation bar according to the platform, and not the default Label style which is the actual behavior. I searched in NavigationPage class but I did not find any property for text size.

How can I find that ?

Thanks,
Galactose