AutoGluon does their own benchmarking, the default is Elo, but you can switch to other metrics:

https://huggingface.co/spaces/TabArena/leaderboard

xgboost is listed, they say "tuned" but who knows what that means. and its below CatBoost and LightGBM

as an aggregator of models (trees, neural networks, clustering, ...) AutoGluon doesn't really have a dog in this fight