Broadway Joe

I was fortunate to get out and see 9 games this season in 5 different stadiums. In the first 5 games both teams did the “social distance” hand shake (10 yards apart) after the game. In 3 of the last 4, the winning team went out for the handshake and the losing team did not. My first inclination is to call this poor sportsmanship and question the leadership of these teams, but maybe it’s an anomaly? What’s the current post game etiquette?