Going swimming

We were wanting to take our daughter who is six years old to the swimming pool. She has dwarfism and is 18 pounds and 1‘5“ tall.

Would Clara need to stay in the baby pool area? We’re going to a public pool and given that Clara is six years old she wants to be in the big pool, not in the baby pool area. We are trying to find a life small enough for, but even with a life jacket what are your thoughts on if this would be safe?