Some common and widely used electron applications are VSCode, Spotify, and Slack. I think Microsoft teams might also be electron based but I'm not sure. There are many more as well.
$ ldd /usr/bin/spotify | grep gtk
libgtk-3.so.0 => /usr/lib/libgtk-3.so.0 (0x00007f06b545d000)
How do I check if it is an electron app?The Web is just fulfilling Java's 'Write Once Run Everywhere' promise.