How can I make camera automatically change its location ,so that it would adjust to the models of different size?

I don’t get it. What is stopping you from rotating the camera? Or rotating the object? Or switching between cameras.

In the pawn with the camera this will give you 6 angles, for example:

306527-annotation-2020-07-08-125743.jpg

An example of how can you switch camera components inside an actor:

You can add as many as necessary.