Wheelchair mode and base/resting calories

While the new wheelchair modes for activities are welcomed, what is missing in regards to those is a way to adjust the base/rested metabolic rate. Wheelchair drivers can have a significantly lower BMR than walkies, for example mine is 1160, which is considerably lower than the rate calculated by Garmin (65kg/169cm/49yrs/AL7). This makes it a bit complicated to gather correct measurements regarding my daily targets. It would be really nice for us wheelies to be able to change those metrics to our personal needs.