Putting aside that MDs trained in medical ethics should be the ones to decide the end-all debate of HRT for those under 18y/o (or maybe 24 by your standard) -- I would imagine "tips" here is mostly about logistics of navigating the US health system and filling in health-effect anecdotes where science has yet to affirm/study (which encompasses more areas of health than you might think). Also, "Invasive" and "non-invasive" are usually reserved for surgical contexts so I'm not sure I would apply that here.

Zero kids are getting HRT without their parents consent, don’t spread transphobic FUD

It's not about the kids of their parents, it's about other parties that are promoting or encouraging HRT to other people's kids.