Yes and no....several tuners now supporting (and pushing forward) the M57/N57 platform. Most have hit a limit of 500 whp and 700 wtq because of cam profile and back pressure issues.
The M57 is about to make a HUGE evolutionary step forward, similar to when the first ST was made for the N54. My car will be north of 650 whp and over 750 wtq as I am solving the above issues, and adding a custom EFR LP turbo mated to my HP hybrid.
I have an M57, N57 section but I am waiting for some posts to put in there first so its not empty. If you make some posts in BMW general on the diesel engines, once a few are collected I'll open it up so you have a home here