Basilisk v2 horizontal scroll

Hello! I haven’t found a way to assign tilting wheel to scrolling horizontally to onboard memory (says it requires synapse). I want to use my basilisk v2 with macOS as well but synapse 3 isn’t going to be available on macOS. I thought such simple action can be stored on onboard memory (and cheaper competitor mice are able to do so). Is it something I am overlooking or it really can’t be done?