I tend to live stream the first part of my lesson in Teams and then move to the chat in their channel so students can share work. Firefly is where I keep my lesson resources for each week and then I set tasks there when I want to give feedback. KS3 all have blogs that they use as on-line sketchbooks as well.
I have all my classes set up as attendees so no funny business, and the share my screen function is amazing. I also use planet eStream to compress videos, normally just time lapses or videos of me or a student drawing.
Explaining a task to a year 7 class:
https://web.microsoftstream.com/video/343fbd34-e2c9-4579-ac42-2652868bf930Firefly resources page that accompanied the lesson:
https://leshigh.fireflycloud.net/art/junior-art/y7/elearning/week-3