I was able to get a simple example of turning the stick LED on and off with a slider switch. You need to alter the coordinates and size of the qr in order to make it visible on the screen
0_1583288004985_Screen Shot 2020-03-04 at 13.11.55.png
Response is a little slow though, you may want to try IFTT or try to use http request and control from the browser or make an app with mit app inventor, I made a guide here a while ago, It's using arduino but I hope to do an updated version once I get an android phone. https://www.hackster.io/lukasmaximus89/m5stack-and-mit-app-inventor-47bd32