Hi,
I assume you can't use the midi cc controls for any synths.
It can be about two things in the DAW.
1. In Studio One's keyboard/ controller setup, you have to be sure you have'nt chosen to not use controls.
2. If you map a midi CC for Studio One's Control Link, then that midi CC don't work for "normal" midi CC assignment. It only work using Control Link. You can Map the control link to ie Analog Lab then.
Beside that also be sure, that the controls you use actually send out midi CC's.
Also be sure you have set your controller to the correct mode.
If this does'nt help, then more info is needed to help more. Like screenshot of your keyboard and Control surface setup in Studio One, and info about whick mode you use on your Keylab Essential, and if you have checked the midi CC is passed. Also please tell which OS you use.
I have Studio One 3. Windows 10.