Hi, I'm not sure if it's exactly what you're looking for, but I made an Android app for melodic practice, that works with screen readers to tell you which notes are playing. It's not a formal ear training system or anything, it's a tool that generates melodies in various scales that you can use for practice - so you can use it for ear training by generating phrases and trying to copy them, or testing your recognition
$1If you do try it out I'd appreciate any feedback, even if it's not what you're after! Especially if you don't use TalkBack specifically - getting it to read note names normally is surprisingly tricky