Hello,
Do you have users in your environment with Entra ID P1 licenses (included in M365 Business Premium, M365 A3, A5 F1, F3, E3 & E5 for example) ?
If yes you should see something like that when you go to Entra ID via the Azure Portal or Entra ID portal
After that you should be able to add groups to the service principal (Enterprise Applications)
Regards,