Hey Josh,
yes, it’s the value after the “Z” in the line “G38.2 Z-10.0”. You can increase it to -20 or -30 or more. This means the distance it shall slowly lower Z to find the probe before it aborts, so it’s exactly what you can accomodate to your need.
By the way, I posted an updated version of everything here (with comments that explain the commands)