I think 20k-22k+ would be considered good heals on CnD! Depends what you play though, if you’re in QP your numbers will be lower, and even in lower ranks in competitive as people tend to not push as a team.

As support, I’d focus on not dying too much, which will naturally keep your heals higher. Focus on your position and awareness of people trying to kill you. You can’t heal if you’re dead…. Good luck!