Compatibility with 3rd party plugins varies by plugin. This article offers more information on connecting your FLkey with third-party plugins: support.novationmusic.com/hc/en-gb/articles/5210092491282-FLkey-Controlling-3rd-party-plugins-in-FL-Studio
While The parameters the FLkey maps to in FL Studio's plugins are fixed preset mappings. For third-party plug-ins, you can use the Custom Pot mode to create your own mappings. These can be mapped to your liking in Components. For more info on custom modes, you can reference page 38 of the user guide which I've linked here. fael-downloads-prod.focusrite.com/customer/prod/downloads/FLkey%2037%20User%20Guide%20v4%20English%20-%20EN.pdf
