We haven’t found any moons around exoplanets, which may be because they are flung away and turn into “ploonets” – a fate that could one day befall our own moon
Source:
https://www.newscientist.com/article/2208411-exomoons-that-run-away-from-their-planets-could-become-ploonets/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home