Google Meet is for video/audio meetings. You can create a Google Meet, but students cannot.
You can create a Meet in several ways.
For this to work, you must click the settings Gear on your classroom, scroll down to General, and turn on the Google Meet for your classroom. This is the easiest option because you can display it right at the top of your classroom as shown in the example.
The ability to use breakout rooms, polling and other new Google Meets features is available by request only. Please put in a Helpdesk Ticket to request this at https://help.portlandschools.org
Students cannot create their own Google Meets, but when you create a Google Meet you can share the link and phone joining info with students and they will be able to join and participate. For students the https://meet.google.com has no Create Meeting. - Example
New Google Meet Layout Demo, May 2021
K-2 iPads, Meet, Clever