Adding email groups in power bi security

HI Guys 

   I am new to power bi, I developed a report and assigned RLS roles to each users in the company through "MANAGE ROLES" in power bi desktop and then i published the report in Power bi service.

Then i went to the datasets - Security to add the users in the group but since my company has around 150 users across india i cannot add all the users in the list.

So i created an email group with the help of IT team and added all the 150 users in the group.

Then i asked the administrator to add the group in the Azure active Directory from Microsoft 365

Now when i add the group in the security and checked the report through apps i cannot able to view it as the content is restricted.

Is the steps correct or someone please provide the details of how to do it, as i am completely stuck here.