The leader did not receive the New Year greetings from his subordinates.

You think too much. There are many things at home during the Spring Festival. Maybe the leader is too busy and too many people reply at the same time. This is normal. If you have to think about it more, you can also think about it. It's early in the morning, and the leader will give you feedback. How much he cares about you and values you. Don't you think so? Hehe, sometimes it should be simpler, and many times it's just your imagination.