These specialisations are in addition to the usual topics I can teach regarding feminisation and masculinisation. They are advanced topics or special cases I account for outside of the typical "change weight, resonance and pitch" paradigm.
Feel free to ask about any of these topics or request a checkup to see if you need help in any of these areas. I often offer free lessons to anyone suffering from vocal function issues in particular (provided they are within my ability and I am legally allowed to help).
Disclaimer: many of these things could constitute a reason to see an SLP. If you have vocal health issues and are concerned, an SLP is better equipped (and allowed) to help you with those.