I did some research on Locks of Love again, to be fair. They are a charity with a good rating.
They only donate to people under 21
The parents have to submit a current tax return.
The participant has to have a vacuumn (?) fit silicone scalp prostesis (?) made and sent to LofL, into which the hair is inserted.
can't imagine how sweaty thhis must be. Children's heads grow so for something like alopecia new wigs would need to be done over time and tax returns submitted again.
They have about 7 million in the bank according to the fine print.
https://locksoflove.org/forms/hairpiece-application/