Complete Parameter List page inaccurate

Confused by what I think are a few inaccuracies in the Complete Parameter List: BARO_EXT_BUS - says “This selects the bus number for looking for an I2C barometer. When set to -1 it will probe all external i2c buses based on the GND_PROBE_EXT parameter.” Yet there is no documentation for GND_PROBE_EXT. Also gives just three valid BARO_EXT_BUS values as -1, 0 (bus0), and 1 (bus1). Yet Pixhawk-4 supports four I2C buses, so presumably BARO_EXT_BUS values should be -1, 0, 1, 2, 3 - right?