If you plan on controlling an external device from your host using Ctrlr as a bridge, you don’t need to translate CC->Sysex
the host will modulate your Ctrlr knobs without any CC parameters needed, the internal VST protocol will deal with that, you need to assign your sysex to whatever UI elements you like. Unless you want some other external gear that transmits CC to control your other gear that accepts SysEx with a Ctrlr as a translator, you don’t need any special tricks.
If however you want that sort of translation platform then it gets complicated.