In 2014, I used DeployStudio to deploy 50+ MacBook Pros on 10.13.x. but DeployStudio long dead now. I believe that SuperDuper could provide you a serviceable, manual quasi-cloning solution for a *limited* amount of machines, but it is basic cloning only. It supports 10.15. But there is no central server/console, no app deployment, no multicasting, no user management, NADA. It basically works for me on 10.14 and 10.15 but test and use at your own risk