You mean left turn switch on left bar and right on right bar? They stopped doing that for a while now...
Yes.
Back in the day, I had taken an R80RT, at the local BMW dealer, for a test ride.
Those turn signals were a complete PITA.
Not only did they not cancel when pushing the button; but the right button required me to take my fingers off the brake lever to operate the right signal.
In the area I lived at the time; that was A BIG no-no.
Taking your fingers off the front brake lever for even a second could mean collision with right-of-way-violating cage driver.
I lived in NJ at the time. Some of the most crowded roads in the USA.