OIDExternalUserAgentIOS not run in main tread

**Describe the bug**
`presentationAnchorForWebAuthenticationSession`, -[UIView window] must be used from main thread only

**To Reproduce**
Steps to reproduce the behavior:
1. Go to '...'
2. Tap on '....'
3. Scroll down to '....'
4. See error

**Expected behavior**
A clear and concise description of what you expected to happen.

**Screenshots**
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**Environment**
- Device: MacBook Pro 2019
- OS: macOS 15
- Browser: embedded iOS app popup browser

**Additional context**