That's completely false. Firstly "grooming" is the specific behaviours that pedophiles engage in prior to sexually assaulting a child. They are friendly, welcoming, and helpful. When the child trusts them, they start with the touching, and telling the child they're "special". The pedophile seeks access to the victim, and manipulates the child into think that the abuse is the child's fault, and we must never tell anyone or your "friend" will go to jail.
In one case I know of, the man was assaulting his own children, and their friends. His wife would take the friends aside afterwards, and tell them that if they told anyone what happened, their friend's father would go to jail, and the family would be homeless and starve. And it would be "their fault".
Seeking care for a transgender child is the furthest thing from "grooming" possible. No trans child can receive surgical treatment until they're a physical adult. That's biology and medicine.
What is "pure evil" is preventing these children from getting any at all. Parents and doctors should be making these decisions, not crazy Republicans believing Q-anon propaganda and complete bullshit about non-existant "pedophiles and groomers".