The ambient lightning is there, but not active. You can purchase something from 3. part that activates that, and other stuff. Take a look here: BONUS Module - For Tesla Model 3 . I have not tried it, so I do not vouch for this. Just found it a few days ago.
After using a device like the Ingenext Bonus module to activate the ambient lights, what is the most complete ambient lighting kit that works for 2021 M3? Something as close as possible to what the OP described