Hi @Efff dd • Thank you for reaching out.
Yes, this is possible. You need to make sure that all the required subscriptions are added to the Management Group and you have added the required set of users with Reader role at the Management group level. The reader permission will then be inherited to all subscriptions underneath the Management Group and the users will have read permissions on the subscriptions that inherits the permissions.
-----------------------------------------------------------------------------------------------------------
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.