Everyone is training, and the hashiras are all training the ones below them, you're a hashira so you've been training the lower ranked demon slayers with Muichiro.

"Mui, I think Tanjiro can move onto the next Hashira now." You said. Muichiro nodded in agreement with your statement. Murata spoke up. "Mui, can we go to the next hashira too??" Muichiro glared at Murata. "No, you're far from ready, and don't ever call me "Mui" again. It's Tokito to you."