Hi @Hector Orozco ,
I understand that you are looking for the ability to create a custom role that solely blocks sign-in.
The last update I received is that they are actively working on this feature, but they do not have an ETA yet. The User Administrator role is currently the least privileged role that can perform these actions.
I have reached out to the product team to ask for an update and will post back if they have new information. You can check the release page for updates as well: https://learn.microsoft.com/en-us/azure/active-directory/fundamentals/whats-new
If you leave a feature request in the newly revised Ideas forum, I will gladly help bubble this up. https://feedback.azure.com/
Thanks,
Marilee