Sandbox SSO roles

I’ve configured my IDP to put our developers into the sandbox_user or sandbox_admin roles, just like the developer role, but it seems like the roles are not being assigned correctly. Do I need to do something special to get the roles assigned? Right now people can only see the sandboxes they create themselves and we’d like to be able to create shared sandboxes.

right now I am trying to gain access to all of my payments for they have all been stolen from me for years..everything the payment need to be directed to my correct information along with all my payments details,updated banks, funds, everything is being taken. this is heartbreaking and it is being reported to the proper authorities. I am requesting help and honesty. It will go along ways without complete disruption. Thankyou