PAK DA will probably be stuck in development hell just like the Tu-160M and the Tu-22M3M. Too many bomber programs I think.and China will have H-20 in meaningful numbers. Not sure about Russia tbh.
The engine for PAK DA, Izdeliye RF, is in bench testing. The airframe is being built. The demonstration model is supposed to be ready next year. But I doubt that will be a flying prototype. At least it won't be flying with Izdeliye RF for sure. Will take a minimum 2 years for the engine to go from bench testing to production and I think 5 years is more likely. Of course there is a possibility the prototype will use the NK-32-02 or some other already available engine initially so who knows.