Fact is that Carrot should have had an important moment in Wano to keep her relevant enough for joining but Oda didn´t give her that.
I will say that in hindsight her fighting Perospero proved to be a much bigger deal than first thought
Because since she saved Marco she started a series of dominos that helped or even kept the raid from failing.
Marco was about to get either killed or injured by the Big Mom/Perospero combo, but Carrot was able to save him.
If Marco died/got injured there then that means no fire to hold off the ice oni virus, which means that Chopper never makes a cure, which leads to no one being able to hold King or Queen back when they start to rampage on the live floor, and that Zoro and Izo don't get moved to their important locations and so on. Not to mention all the trouble Perospero would've caused if he got to the live floor alongside Big Mom.
Carrot fighting Perospero ends up being an actual significant moment because since she fought Big Mom's first born worth 700 million berries it ends up helping the raid in a significant way.
I honestly might make a thread about this tbh...