Sending emails from AWS SES to private relay service

Feedback report id: FB16605524

I'm trying to send emails to private relay service addresses using AWS SES and emails are not received. My emails are sent from dev@mydomain.fr and I've set a custom FROM domain of mail.mydomain.fr. I've added both domains and the dev@mydomain.fr adress to the "Certificates, Identifies & Profiles" section. I've set up DKIM and SPF for both.

Attached a redacted version of email headers.

Sending emails from AWS SES to private relay service
 
 
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