They collect a lot of information, but make very little of it available. What is available isn't exposed in a particularly friendly way. Some of the extra data they gathered makes it into the Year in Review stats they make available at the start of the year.
https://social.bdash.net.nz/@mrowe/111779120066480793 shows an example of this.
I'd love to be able to see a moving average of my score on a particular game so I can see how I'm improving (or not) over time. Beyond that, I'm not sure what data would be useful other than as a curiosity.