(You can clearly see why you don’t use physics on doors.) Even if you need to make some stuff, like pushing some object through them? For example hospital medical bed through a double door? How can you make an animation for this stuff? Without physics I doubt.
About rig. Yes, I have thought about it as you suggest before my post on the forum. And started doing it, but then I thought what if I need to do some more complicated stuff with a more complex structure? So I made a 5 min rig. And now I found how to set transform. First, get the Anim Instance from the skeletal mesh, after cast to animation blueprint class, and then set transform. It works, but now I have another problem. On a video, you can see. That animation has a delay. How to fix that?