Virginia

a part of the treatment planning.

The pediatric sexual offender residential treatment center I am familiar with is for males only.
But perhaps there are some accommodations for gender fluidity issues.

Female sexual offender treatment centers would be less common I assume.
But if his/her victims have been female that would be a liability issue.

I would think it is important to determine exactly how the teen is identifying and comfort level with various treatment settings.

And what would be the safest option for the teen and others, staff and patients.

Yes 1:1 could be done, I know they use nursing graduate students to do that kind of work.
They sit with one psych patient for the entire shift.
My daughter actually did this kind of work while in grad school.

I think first we would have to assess the teen for psychosis, drug use, mood disorders, etc.
Treat the acute conditions first, then try to find the best sexual offender treatment program.