While she may not have attended every year, she has appeared at the IIFA Awards in the past. She's even been a part of the award ceremony as a presenter or performer.
It's possible that she has not attended recent IIFA Awards, but this doesn't necessarily mean she wasn't invited. There could be various reasons for her absence, such as scheduling conflicts or personal preferences.
It's important to avoid making definitive statements about someone's attendance at an event based on limited information.