Today we (Depot) are not, though some of our customers configure this. For the moment at least, the ephemeral public IP architecture makes it generally unnecessary from a rate-limit perspective.
From a performance / efficiency perspective, we generally recommend using ECR Public images[0], since AWS hosts mirrors of all the "Docker official" images, and throughput to ECR Public is great from inside AWS.
[0] https://gallery.ecr.aws/