[Popover]: Does not close when focus goes to a nested iframe

[MapTo0]

Bug Description

Hello,

The Popover is not closing when we focus out it and the target is contained in an iframe within a shadowroot.
As mentioned in #6087 Popover does not close when the focus goes to an iframe.

In our use case (Rich Text Editor), feel free to contact me for reproducible example (internal), the structure is the following

<rich-text-editor>
  #shadow-root
    <editor>
      #shadow-root
        <iframe>

and the logic https://github.com/SAP/ui5-webcomponents/blob/main/packages/main/src/popup-utils/PopoverRegistry.ts#L22-L26

does not cover the use case.

Affected Component

Popover

Expected Behaviour

No response

Isolated Example

No response

Steps to Reproduce

internal, feel free to contact me.

Log Output, Stack Trace or Screenshots

No response

Priority

Medium

UI5 Web Components Version

latest

Browser

Chrome, Edge, Firefox, Safari

Operating System

No response

Additional Context

No response

Organization

No response

Declaration

• I’m not disclosing any internal or sensitive information.