The antibody figures seem typical for most people, meaning she is ok at the moment. I have never seen anyone with zero antibodies, so i think we all have them. So i don't think she has hash's.
Folate can come up, what about iron levels ?? Typically they will be low in hypoT patients, certainly woman. Worth getting ferritin tested at the least.
The thyroid panel looks good. Ft4 is in the high teens (tick), FT3 is pushing towards the higher end (tick). So these look good, but her TSH is raised at 2.16. Docs will look and say all is perfect. With these good free figures i would expect a lower TSH, so this may indicate she is not absorbing the T3 as well as can be.
I would have thought the adrenals will be under pressure and she has stress as a main factor as to why she is not doing so well emotionally. This is so typical for young people with the pressures ahead of them. If this isn't sorted out it can lead to more problems and then the thyroid system will start to suffer and you end up on a downward slope.
A 24h saliva panel would be could to see how cortisol and dhea are working.
I would look into food and approach it from a Ray Peat perspective. He has a forum dedicated to his papers and has quite a following. Avoid sunflower oils, for example. His forum can give you a lot of good info.
He is also an advocate of using a little T3 to boost metabolism. A short cut to getting on top of the emotional problems could be to try small amounts of T3. It can be amazing what 5mcg per day of T3 will do.
Pregnenalone is the main precursor hormone we make from cholesterol. It can be very effective in helping stressful problems. See ray peats paper of pregnenalone.
There is a lot we can do to improve metabolism and when i say metabolism i also mean mental and emotional health. These aspects of the health circle are just parts of the overall metabolism, including physical health.
Nutrition, vits and minerals sups and a little thyroid hormone are keys ways to get the metabolism back on track.