That is weird flex, because
1. Ganadara was released ahead of Tomboy, so it more like Tomboy blocked Ganadara from PAKing, than other way around.
2. It is rather meh to use IU here, unlike her own songs, IU features don't necessarily PAK - Nakka didn't, Cat didn't, Small Room didn't. - the last time her feature PAKed was in 2017 - Epik High.
GIDLE deserves credits for this hit, but not false comparisons.
But a lot of collabs with IU were megahits.
Do you think Jay Park would have charted this good without IU?