An error occurred while saving the commentRobert Morelli commented
The only app that currently has math recognition and conversion to LaTeX is Nebo. You use the MyScript ink engine, so I assume you have the capability as well. Nebo's implementation is poor, so you can leapfrog them. The name of the game is CONVENIENCE.
1. Nebo has a Math Box feature. Okay, better than nothing perhaps, but text and math are almost always interspersed. You need a way to include math inline, in the middle of a sentence, and/or a way of putting words inside a text box.
2. When converting to LaTeX, include the darn escape sequences (dollar signs), so the result can be pasted into a LaTeX document without the user having to add these. (Inexplicably, Nebo and MathPad don't do this.)
3. STEM students and researchers are ahead of the curve on technology adoption, so the demand may be larger than you estimate. I'm a mathematician. Every technical person I know has MASSIVE amounts of handwritten technical notes with equations interspersed, all disorganized and unsearchable. Nebo has a bullet point for this, but isn't a real answer. There currently is no real answer. Make Goodnotes a practical answer.
4. There are often numerous ways to render a given mathematical expression to LaTeX. You would jump a decade into the future if you offered customizable conversion, with user defined tables of preferred LaTeX output.