This is a painful topic for me too.

Long story short, I developed a basso profondo range during puberty. Being ignorant of ability to actually make my voice sound female, I spent almost two decades doing nothing to explore my luck of having 2,5 octaves of clean voice. Since I also stopped singing long ago, I did lose part of range both up and down.
Now I am training sparsely. Sometimes I have success of a passing voice, enough that people stop clocking me as I pretend to be talking on a phone call. Sometimes I just can't nail it, and that are ugly times when I get chuckles. : ((((
If the surgery option was safe and predictable, I would have gone for it unreservedly, if safely possible before HRT*. Voice training is going to be much work and much further prodding of the dysphoria.
* - As HRT is waited for ages here, whilst the surgery would be outsourced and done elsewhere