SES Does supports (+) addresses. Per
You can add labels to verified email addresses without performing additional verification steps. To add a label to an email address, add a plus sign (+) between the account name and the “at” sign (@), followed by a text label. For example, if you already verified sender@example.com , you can use sender+myLabel@example.com as the “From” or “Return-Path” address for your emails. You can use this feature to implement Variable Envelope Return Path (VERP). Then you can use VERP to detect and remove undeliverable email addresses from your mailing lists.