fishcakes writes:

What is generally done about
chips of this size, or is the answer simply leave it alone and live
with it.

Ordinary epoxy loaded with the same stone dust. An installer should have
plenty of dust from sawing. To patch right, you have to overfill and then
grind and polish. Although you might match the color and have a smooth
repair, the fine structural patterns won't match so it won't be absolutely
invisible.