Preparations for parent entering the US with a LGBTQ minor child for medical treatment

Asking question for a non Redditor friend. My friend is the mother of a teen trans child. She needs to accompany her daughter to the USA for medical treatment (the treatment is nothing to do with the child being trans). The child’s birth certificate and passport are in the child’s former name and gender identity. (AMAB) The child and parent are residents of a small island nation. Parents work in civil service. Mother and child will be flying to Miami and attending a hospital in Florida. The medical care cannot be given on island. They will be visitors, using a US VISA, not applying to work or reside in the USA. They are medical tourists coming to access medical treatment paid for by their medical insurance. The child has been traveling to this hospital for treatment since they were little; but hasn’t been recently and not since coming out as a trans girl.

Accessing healthcare elsewhere will be very difficult. The insurance expects this family to use this (nearest) hospital.

What preparations should the mother and child make and what can they expect in terms of customs/border interaction? Are they likely to face difficulties from healthcare staff if the child patient asks to be treated with her preferred pronouns and gender ID and name when her medical records are in her old name? Is there a risk of the mother or child being reported by a snitching MAGA health worker etc?

Is it too dangerous to come?

I have advised the mother and child to delete all social media and anti Trump memes etc from her phone (she needs to take her work phone), to both dress in simple unisex inconspicuous clothing, to take the numbers of immigration lawyers and advocacy groups, to take her government ID and to inform the island government of her trip in case she needs them to advocate for her,

Mother and child are Latina, and speak English and Spanish, they are bilingual and they speak English without an accent.

Thanks for any help you can give. I hate that things have come to this.