To find gMSA (Group Managed Service) Accounts i.e. group managed accounts and if your ADUC doesn’t have this as an option you can use a “Custom Search” and click “Advanced”, then use the following string in the “Enter LDAP query:”
objectClass=msDS-GroupManagedServiceAccount
https://www.mssqltips.com/sqlservertip/5340/using-group-managed-service-accounts-with-sql-server/