Incorrect X coordinate of clicking on an element inside the Shell.FlyoutHeader

### Description

I created a Custom View and added a UITapGestureRecognizer to it. This element is located in the Shell.FlyoutHeader. When clicking on the CustomView, X coordinate value is incorrect (greater than 300).

### Steps to Reproduce

1. Download project from https://github.com/JaneySprings/Maui-iOS-Gesture-Bug
2. Run on iOS.
3. Open Flyout and tap in red square.
4. Check CGPoint coordinates in output (or create breakpoint in "Platforms/iOS/CustomViewHandler.cs -> public void HandleTapGestureRecognizer(UITapGestureRecognizer recognizer)").

### Version with bug

6.0.419 (SR3)

### Last version that worked well

Unknown/Other

### Affected platforms

iOS

### Affected platform versions

all

### Did you find any workaround?

_No response_

### Relevant log output

```shell
2022-07-25 15:30:41.398273+0400 app1[19154:246375] Point in View X:330.5 Y:113
2022-07-25 15:30:41.398464+0400 app1[19154:246375] Point in Window X:105.5 Y:133
```