the nrfConnect scan times out and won't search for new devices after that so if you entered dfu mode after scan ended you may not see it, so close and restart app again or click scan on the top again. Also if you really see lots and lots of devices then moving to some other area might help too. Otherwise this really looks like something may be wrong with the watch.
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.
the nrfConnect scan times out and won't search for new devices after that so if you entered dfu mode after scan ended you may not see it, so close and restart app again or click scan on the top again. Also if you really see lots and lots of devices then moving to some other area might help too. Otherwise this really looks like something may be wrong with the watch.