I'm currently using https://xapi.us/ to get data from XBOX. We want the data similar to what this site has: https://rocketleague.tracker.network/rocket-league/profile/xbl/Exlzia/overview.
Now I've tried the endpoints /v2/{xuid}/achievements/{titleId} and /v2/{xuid}/game-stats/{titleId}, but both just doesn't have the same data like above. So I guess my question is if I'm using the right API service for the job?
That website looks like its getting a lot more information than what Xbox API provides.
I suggest you look at using the Rocket League API - https://api.rocketleague.com/