as far as I know, there isn't anything even kind of close to what you're looking for (but I'd be super happy if someone came and proved me wrong because I'd benefit from that too)
you could download any of the numerous apps that track your pitch, but pitch is a relatively small part of what you probably are looking to achieve.
unfortunately, the best resources I've found are from YouTube videos and like, random collections scattered around the web
TransVoiceLessons on YouTube has good introductions to what's most important to practice, even if her videos can be a little too jargon and theory-focused for my taste. like, I guess it's cool to know the names of the different resonant chambers in the throat, but it doesn't help me get a voice I like, y'know?
Renee Yoxon teaches a very similar technique and more concise, but I have trouble learning from someone whose voice never dropped since I learn best by imitating. might work for you though
I really like how SeattleVoiceLab sounds, but I've never been able to take anything useful from her videos. I like trying to imitate her though
https://transvoice.party/ has good guides, specifically the "collection of Selene Da Silvas clips" link under Documentation
I've hit a pretty bad plateau myself, so I'm considering just living with how I sound at the moment until I can afford paying for some in person lessons. technique and practice helps but feedback and feeling comfortable using your trained voice in front of other people is the biggest hurdle I've encountered by far