Return OS to software list

Hello, please return the operating system to the software list. Or explain how to bind licenses to the OS. For other programs - everything is fine. But if I have a license for an OS, then I have to select the corresponding software to which it belongs, and there is no OS in the list of software. Now I have to manually create the desired OS in the software list, then enter the license and manually install the OS in the software list for each computer. PS: It was in versions 9x, for what logical reasons it was removed in 10x - I don’t understand.