I'm not creating classrooms using Google Classroom, as I join courses that other professors have created. Our university works with Outlook and Teams, but I still use Google Classroom when joining other courses.
Indian professors are using Google Classroom extensively, so when I log into any class related to Indians, I find them using Google Classroom.
In my university, we use Moodle, which is an open-source learning management system that I think is more powerful than Google Classroom because it gives many insights. It allows me to create a pool of questions and request the system to provide questions from each pool. For example, if I have five pools, and every pool contains 100 questions, I can decide to extract only 10 questions from each pool for my students. There is a log file that I can open to verify when announcements were made and when students last logged into e-learning. This helps prove when students miss announcements because they did not log into the system. The log file is significant for both teacher and security purposes.