How can I add multiple images to one gameobject

I have a character gameobject which has Healthbar and one booster. When it collides with the enemy or an obstacle healthbar image's fill amount decreases. And while using the booster, speed boost image's fill amount also goes down. But when I try to add these two images I'm able to decrease only one of them and the other one doesn't work.

These are the screenshots of the problem. Already grateful for any help.