Making charts (of any kind) accessible is a really hard endeavour. I watched the demo videos and if I’m allowed to make a suggestion... Add the context to the data points. A simple “50k” might not cut it for people navigating the plot with their fingers over a smartphone.
Full disclosure: I worked with those peeps a decade ago and really love their work.
I recently build an AR indoor navigation system for people with cognitive impairments. Is there any way to include an inertial measurement unit (IMU) in this form factor so we can use VIO?