not able to see the UAT environment powerapps console

Question

Hi Team

We enabled couple of our users to powerapps UAT environement. i've added them in the required security groups and also provided them powerapps premium licenses. The users still cannot see the UAT environment. They just see the default environment. I ran the diagnostic against their account in the UAT environment and all the checks shows green. The license, the access to environment and the security roles. All of them are green ticks. Its more than a week and they still dont see the environment. May i know what is causing this delay? am I forgetting something?

The dataverse security role that I added the user is in "Basic role". But does this affect access to the environment?

i dont think so. Can someone suggest please