This is something we should really start a new thread for, but yes, you should be able to request a higher sampling rate (you can on the original Bangle.js 1 and 2, but it doesn't work yet on the new sensor as some more reverse engineering is needed).
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
This is something we should really start a new thread for, but yes, you should be able to request a higher sampling rate (you can on the original Bangle.js 1 and 2, but it doesn't work yet on the new sensor as some more reverse engineering is needed).