Controling VSTi instruments with the sliders

[TheodorHK04]

Hi everyone,
So, I recently replaced my Komplete Kontrol S61 Mk2 with a second-hand Genos 1, mostly for the styles. The Genos has more sliders and knobs than anything I've owned so far, so I was wondering if it would be possible to control VSTi instrument parameters with them. I tried assigning them through MIDI learn in REAPER, but it didn't work. Many of the sliders seemed to control the same CC, and they all give different values. For example, I tried assigning expression to the first slider, but even when I bring it all the way to the top, it isn't that loud. Does this have to be configured in some menu on the Genos? If so, will it save those settings to a registration? I'm blind, so I couldn't adjust those settings every time I wanted to use a VSTi.