SearchBar background not changing on iOS

[emorell96]

Description

SearchBar has a black background kind of frame and setting BackgroundColor doesn't change it:

How it should work on Android:

How it doesn't work on IOS:

Steps to Reproduce

1. Create a new MAUI app
2. Add a SearchBar
3. Set the background color.
4. See it not work.

Version with bug

Release Candidate 2 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

ios 15

Did you find any workaround?

Using the handler allowed me to remove the background (the idea was taken from this stack overflow answer https://stackoverflow.com/a/67327638/6451669)

Microsoft.Maui.Handlers.SearchBarHandler.Mapper.AppendToMapping("NoBackground", (h, v) =>
        {
            h.PlatformView.SearchBarStyle = UIKit.UISearchBarStyle.Minimal;
        });

You can use this to change the background:

Microsoft.Maui.Handlers.SearchBarHandler.Mapper.AppendToMapping("BackgroundBlue", (h, v) =>
        {
            h.PlatformView.BarTintColor = Colors.Blue.ToPlatform();
        });

Relevant log output

No response

[v-longmin]

Verified repro on iOS15.4 with VS 17.3.0 Preview 1.0 [32414.199.main]. Repro with above code.