A child choking on their baby teeth when the baby teeth fall out is very unlikely.
Most children will wiggle the baby tooth out and remove the baby tooth themselves before they have a chance to swallow it.
Also if the child does swallow the baby tooth then they will likely have no issues with it blocking their airway and causing choking.
A baby tooth is so small that it would likely just slide down the child's throat and then go into the stomach where it would then come out in the child;s poop eventually.
My sister swallowed a baby tooth accidentally when she was around 7 years old and she didn't choke on it.
Her other baby teeth that fell out she removed and never swallowed but it just happened to her one time.
When I was 3 years old I once swallowed a penny and even a dime and I never choked on them and they came out in my poop when my mom changed my diaper.
She called the doctor when I swallowed the coins but the doctor said as long as I was breathing and was not choking that I would be fine and I am.