I’ve just installed Boot Runner on my iMac (27" 2017) on clean install of Catalina (APFS volume). Also I have a brandnew Bootcamp partition with Win10. To setup Boot Runner I have no icon in my system preferences.
Did Boot Runner still have some issues with Catalina?
Boot Runner 3 is fully compatible with Catalina. Preferences are now set via a configuration profile that can be created here: