"The left has 4 year olds going through gender reassignment surgery..." Source? No one is performing surgery on children to reassign their "gender" last time I

"The left has 4 year olds going through gender reassignment surgery..." Source? No one is performing surgery on children to reassign their "gender" last time I looked at any credible source. However, I would love to see where these claims come from and the facts that substantiate them.