The Pi SPROG 3 Plus is the latest version of a series of expansion "hats" for the Raspberry Pi 3 or 4 series computers, that allow the Raspberry Pi to function as a DCC command station with booster. The Pi SPROG 3 Plus includes dual track bus outputs, one for the primary bus output, and a second bus output that can either be a dedicated programming track output, or a duplicate of the primary, with configurable auto-reversing capability. This all configurable by the user with JMRI (which runs on the Raspberry Pi). It is available as just the Pi "hat" with track power supply (12 or 15VDC), or also including a Raspberry Pi 4b, SD card, enclosure and Pi power supply. See more information on sprog.us.com. I am not affiliated with SPROG or sprog.us.com, just a satisfied customer (a Pi SPROG 3 system). The Raspberry Pi includes WiFi that, with JMRI, can serve WiFi throttles or throttle apps, via it's own hosted WiFi network, or via an existing (e.g. your club or house) WiFi network.
