This website analyzes speech to find your probable alternative names on HN. It’s probably easy to recoup a few more signals to find your name on other apps:
thankfully my speech patterns naturally shift over time for who knows why, sometimes I start using commas too often. Sometimes I start my sentances with capitals, however, it's rare to see me put too much thought into things I write.
sometimes i just dont bother using the shift key at all
https://stylometry.net/user?username=kachapopopow
NB: Seems offline, but it was quite efficient !