Bangle.js 2 touch int pin

but there is another one as well, it fires at 1.5-2 sec in, and it issues an E.reboot() and the screen displays "loading".

Yes, that one should be adjustable with a firmware tweak.

I was looking at swipe event, it only has left/right.

You can see how stuff is handled in touchHandlerInternal: https://github.com/espruino/Espruino/blob/master/libs/banglejs/jswrap_bangle.c#L1475

I believe everything is forwarded as events