Brief answer: No.

Converted documents are always problematic. There is no one-to-one correspondence of features in different formats.

You may recall a game called "telephone" when you were a child. Each conversion introduces minor differences which become amplified every time another one is done. Do it enough and what comes out bears little resemblance to what you started with.

The conversion to pdf does not care about the meaning of tracked changes. It cares about making an image that looks like the printed page would look. When you convert back, all Word sees in the conversion is text, if you are lucky.