Microsoft Teams will let you transform into a 3D avatar in May
theverge.com
theverge.com
Don't. If you don't want to show us your expressions and emotions in a call, choose a nice photo of yourself. If you don't want to appear at all, choose a nice icon.
An animating 3d avatar will not help you communicate your thoughts and ideas. It will be a distracting waste of bandwidth.
(Or worse, we will think you are happy and smiling when actually you are upset and frowning. )