Final update. One egg hatched and both parents stayed busy with feeding and care. Growth was hard to follow because if mom was in the box when opened (which was most of the time) she would stay and cover baby.
Baby has been peeking out of the box for two days, and exited sometime today. I can see parents in the trees but haven’t been able to spot baby. I have seen them aggressively chasing squirrels.
Thanks everyone for your help.