Migrate external integration window doesn't provide option to select platform

### Description

$subject in below window. 

<img width="1478" height="896" alt="Image" src="https://github.com/user-attachments/assets/8ab6dc4d-7186-4af9-9ad3-8e689629c415" />

### Steps to Reproduce

refer abve 

### Version

1.0.0-m1 test

### Environment Details (with versions)

Mac