How do I use Mac dictation in Google Docs?

I'm using macOS 12.3.1 and Google Chrome 101, and I want to be able to use macOS's dictation in Google Docs, but I couldn't activate the dictation prompt in Google Docs. I tried assigning a different key in Sys prefs > Keyboard > dictation, but dictation still won't activate in Google Docs. My questions are: - How do I use Mac dictation in Google Docs, and some other apps, like the terminal? - Can I activate dictation from command line?