The Infinity Blade or Minigore series, for example, or anything made by Illusion Labs. These games are genius and most consoles don’t even have a touch screen or utilise it well like some smartphone games do.
Also why do people look at me weirdly 👀 when I play games on my phone in public while waiting for something?
Tower defence games work well on touchscreen if you enjoy strategy type games.
Between bloons and kingdom rush there are also some top tier games available on mobile.