To transcribe your Google Meet call, you need to download Airgram extension for Chrome first. Please check out this article: How to install Airgram Extension for Chrome?
And if you want to transcribe a temporary Google Meet call, please click here: How to transcribe an instant Google Meet call?
Go to Google Meet and a popup window of Airgram extension will appear automatically.
Find the meeting you want to transcribe from the Meetings tab > click to enter the detail page
When you go to the detail page, click Start Recording.
During the meeting, you can click “Transcript” to check out the real-time transcription.