How do you speed up the side chain effect on patches in Sunday Keys?

All of Sunday Keys time-based effects follow the current tempo. You can set the tempo of a patch by selecting the patch, and then changing the tempo in that patch’s “Patch Attributes” tab.

If you want to increase the speed incrementally (say double or quadruple time) then you’ll need to identify the source of the effect, usually an LFO in the instrument plugin or the Auto Filter plugin and adjust the LFO rate there to achieve the desired effect.