EGM sensors to control fingers

I checked myoware egm sensors and I was wondering if it's possible, using 5 sensors, to capture the signals from moving 1 finger at a time ? I'm trying to achieve independent finger control on a prosthetic arm for a friend.
We're using the InMoov hand with 5 servos.
In case myware sensors don't work, what are my other options ?
The friend has a humerus and a short forearm looking bone with a weird hand joint and a single fat finger. I'm pretty sure he has enough "arm" to capture those signals ?

Is it possible that nobody has that information ? :frowning: