Longshot: Anyone here experience of changing Amazon SES regions?

I’m getting issues with Sendy being very slow to preview and need to change my Amazon SES region. Getting support from them is impossible, so I’m wondering if anyone here has experience of doing this?

On the face of it it’s easy, you just select a different region. But, I know the reality is often different. I have a substantial number of emails and domains verified on my SES account and I’m nervous that changing region might affect their verified status.