Further reading
If you want to set up the ALM Accelerator, you should follow the Microsoft documentation on it. This can be accessed at https://learn.microsoft.com/en-us/power-platform/guidance/alm-accelerator/setup-admin-tasks.
On the following docs site, you can read more about the functionalities of managed environments: https://learn.microsoft.com/en-us/power-platform/admin/managed-environment-overview.