Hey! I'm sighted and just browsing the subreddit out of curiosity so unfortunately I don't have advice. I just wanted to share a relevant research project that a lab I'm interning at did a while ago about using augmented reality to make visualizations for stair navigation:
$1 I just thought it was really neat and thought you might be interested. If the PDF isn't accessible, let me know and I'll summarize!
I don't want to give unwarranted advice, so I just wanted to say that I really hope you find something that's helpful, good luck!