It baffles my mind that they have implemented a feature for headphones, which are more often than not related to mobility, that can not be accessed via the Roon remote app. It is exactly the same as the EQ which also cannot be accessed via remote.
I do all of my Roon control via the remote app, both for headphones and speaker listening. So having to dig out the laptop and create a load of dedicated user presets for any and all eventualities is just crazy.