Debian 11 (bullseye) images are available for preview. They are built and published daily by AWS account ID 903794441882. You can identify the latest using an awscli command such as:

$ aws ec2 describe-images --owner 903794441882 \
    --region us-east-1 --output json \
    --query "Images[?Architecture=='arm64'] | [?starts_with(Name, 'debian-11-')] | max_by([], &CreationDate)"

Adjust the region and architecture as appropriate, and remember that amd64 is called x86_64 in AWS.

Things we're interested in hearing about:

Contact information for the cloud team is available on the wiki

NB These nightly built AMIs are for testing, and may be deregistered from AWS at any time. Don't expect the AMI IDs to be long-term stable.