This issue seems to be a plague or stumper for folk that move to OTA. Other reports or questions such as "My other TV gets channel 42.121 and mine does not. We're in the same home. Why?"

In short, you are subject to all the reasons why a channel may not show up. Maybe a better antenna is required or changing it's orientation.

Are you old enough to remember why folk went from antennas to cable years ago?