The 1st example of such a feature in my mind is trade history - if you are familiar with using popular CEXes (i.e. Binance), then you'll know that they have a Trade History tab. On this tab, you can see all your trades that you've ever made with that account. You can also export that history as a CSV file.
This is incredibly useful for analysis and many other reasons. Users often want to download their data and be able to use it.
Other potential features are a dashboard where users can see global trading metrics on LeoDex/Maya Protocol as well as deep analysis on their own account (wallet) that they are signed in with.
For example, seeing the total $ value of all the trades they've ever made... what assets they trade the most... what assets are traded on LeoDex most frequently...