Don't know if anyone has already proposed this, but I think one of the most painful points of working with XAML is the bindings.
I worked with WPF for some time, but it's been years since then. I remember the basic ideas of binding but then I came across this when I was reviewing some MAUI code:

<Entry Grid.Column="1"
            Placeholder="{Binding Placeholder, Source={x:Reference This}}"
            Text="{Binding Text, Source={x:Reference This}, Mode=TwoWay}"
            BackgroundColor="Transparent"
            TextColor="DarkGray"
            Margin="0"/>

I'll focus on the Text propery, okay, yes the very first part, it's quite clear but the second part?

• Source={x:Reference This} No idea what it the purpose of this, and I dont think it's self explanatory
• Mode=TwoWay Do I need to specify the way of the binding? Really? I would expect that a binding works TwoWays at least 95% of the time, if not just a simple value instead of a binding should be enough.

I think it's quite confusing for new commers (and not so new) . So inspired by this video .NET 10 for MAUI: what to expect? Number 3 will shock you! by @jfversluis where I saw that some XAML improvements have been introduced in MAUI. I wanted to propose the introduccion of the binding system that Blazor uses. It's not a replacement of the old system but something extra that I think it can be very handy.

Instead of that verbose way of doing the bindings why not something like:

<Entry Grid.Column="1"
            bind-Placeholder="Placeholder"
            bind-Text="Text"
            BackgroundColor="Transparent"
            TextColor="DarkGray"
            Margin="0"/>

That will remove all the verbose code and make the components much easier to work with. No idea how this should work behind the scenes, but prety sure that the second block of code is understandable by everyone.