You'd have to increase the size of your reachable area. It's not going to ignore the limits during G29 (apparently) though I can see why you may expect it to. I think M564 is intended for manual input from the user rather than automatic moves like in G29. If that makes sense.
It's also worth noting that it will extrapolate the heightmap outside of the probed area, so missing a couple points there might not have any real impact.
Using a offset probe like the BLTouch on a delta is problematic for a few reasons. Effector tilt mainly. This would be another. Using a nozzle contact probe is preferred.
This is also common with non-delta printers as well and it's common to have to adjust the M557 range to accommodate the probe offset, otherwise it will just skip points it can't reach.
