How can I get AMP approval for my emails?

I think you should following these steps:
Here’s how you can verify and correct the MIME parts in your email:

1. **Check MIME Parts**: Confirm that your email contains all three parts. In Braze, ensure that the `text/plain` and `text/html` versions are present and not just the `text/x-amp-html` version.
2. **Ensure Similarity**: The content in the `text/html` part should be a simplified HTML version of your AMP content, and the `text/plain` part should be a plaintext representation of it.
3. **Email Structure**: Ensure your email structure aligns with AMP guidelines. You can use tools like MIME parsers to inspect the email’s MIME structure.

Correcting these aspects should help meet the approval criteria. If issues persist, review the documentation on AMP email guidelines or seek further assistance from Braze support.