As of now, the sim rates available are powers of two, i.e. 2x, 4x, 8x, 16x, etc.
Request we get 2x, 3x, 4x, 5x, 6x…etc. Most planes fly fine at 4x, but a number of planes have issues oscillating up/down or left/right at 8x. Would be nice to have more options.