As of my limited knowledge up until September 2021, there have been no confirmed discoveries of exomoons (moons orbiting planets outside our solar system) yet. While there have been several promising candidate exomoon detections, further observations and analyses are needed to conclusively confirm their existence and characteristics. The challenges in detecting and confirming exomoons include their small size compared to their host planets, the immense distances involved in extrasolar observations, and the complexities of distinguishing exomoon signals from other astrophysical phenomena. However, ongoing advancements in observational techniques, such as microlensing, transit timing variations, and high-resolution imaging, continue to improve our ability to detect and study exomoons, increasing the likelihood of future confirmed discoveries.