Sir_Ivan Banee_ there is no specific support for mouse buttons, but if your mouse buttons can trigger a shortcut press (e.g. shift+ctrl+F10), then you can use it as a workaround.
NLE_Ninja It depends on your mouse software you are using but you can keybind Excalibur shortcuts to your mouse. I've done it before with the MX Master 3 and Logi Options.