Finding moons around exoplanets is difficult because current telescopes lack the necessary long-term temporal coverage to observe the periodic signals of moon-induced wobbles.

“we're looking really for like wobbles of planets and if you're looking for a wobbling planet then you have to have at least like three or four transits of these plants and these plants have to be quite far away from their star in order to have moons is there to pose to the star the moons are gonna g”