Scientists Have Measured A Black Hole, And It Has A Mass Of 660 MILLION Suns

If every major galaxy has an SMBH, has the erroneous orbital speed measured at galactic perimeters been assessed against the lens thirring effect?

I have to assume this will have been looked at but raise the topic because I haven’t found any reference in this area.

If lens thirring is adding angular momentum to bodies within a certain periphery of a CSMBH, what effect does that added momenta have on the greater periphery of the system?

*Lense-Thirring

It seems to me that with the high rotation rate of super-massive bodies central to a galaxy there would be significant gravetic distortion through the effect of length contraction, ie; the rotating bodies toward the centre are travelling both toward and away, in their rotation, from the outer galactic bodies at a significant velocity.