Adjusting rate for metabolic acidosis?

Hi! New RT here, appreciate all advice. I have a patient on the vent whose morning ABG was: 7.27,41,18 bicarb. I didn’t adjust his rate or tidal volume because to me, this is a metabolic issue and not a respiratory issue. When giving morning report I was asked why no changes to rate/volumes were done. Can someone explain why I would adjust with a normal CO2? I just want to make sure I’m not repeating a mistake in the future if it needs to be corrected! Thanks!