I'm late. Should I tell the leader? Is the company group still used?

When you are late, you should take the initiative to go to the leader to explain the reasons and admit your mistakes to show your respect for the leader, but you don't have to say it in the group. It's not necessary. You just need to let the leader know your sincerity. Don't wait for the leader to talk to you, you will be very passive. Wrong is wrong. Take the initiative. There's nothing to be ashamed of! For the future development!