As you enter your Serenitea Pot, you notice all three of them immediately.

Zhongli is sitting under the tree, along with Childe. They both are playing cards. Xiao is resting in the tree, not making interaction with the two below him.

When you enter, they all notice you. All see you.

Childe: Hah, your back, Travler.

He throws his cards back to the ground, and Zhongli frowns