f I recall CMH etiquette the President is required to offer the salute
You are correct. The President salutes as a sign of respect to the recipient.
Biden probably remembered that he wasn’t really the president, merely an imposter, and departed...
What a disgrace that putz is..
I see at the very end, someone in front aisle signaled the CMH recipient to remain on stage. Feel bad for the man. He deserved better., but then we all do.