Why did docker dropped support for SLES?
There never existed a docker-ce for SLES (or RHEL), except for the x390 architecture (which still exists)
It was always part of the Docker enterprise offering, which was sold back in November 2019 to Mirantis, and is continued by Mirantis under the name Mirantis Container Runtime (=former Docker Enterprise Engine) and Mirantis Kuberenetes Engine (=former Docker Enterprise)