sending to Private Relay Email using amazon ses not working

Hello Developers,

I have ran into a problem while sending mail to apple private relay email. We have built a mobile application where user can sign up through apple and they can sign up using hide-my-email feature. Which provides private relay address for us. Now we want to communicate with them using private relay mail address. The technology we are using to send emails are amazon SES, have done SPF, DMIK, DMARC and added domains in apple identity services for mail communication, passed an SPF check as well. But still mail is not getting delivered

what am i doing wrong or apple doesn't support third party apps for sending emails to private relay? Is there any other way to achieve this please let me know

Using the same body as attached in image is working fine for rest emails.