There are many pages that I found about it, like
- Classic Azure Role Removal
- Azure Classic Administrator roles are retiring on 31 August 2024
- Prepare for Co-Administrators retirement
- How to migrate classic co-administrator roles to RBAC
All of them talk about the how part, but
To avoid potential disruptions in service, transition any classic admin roles that still need access to your subscription to an Azure RBAC role by 31 August 2024, when classic admin roles will no longer be supported.
What RBAC roles are (somewhat) equivalent to Co-Administrators, focusing on the VM creating/deleting part?