Not being able to see your stats may be due to this reason:
DreamTeam tracks stats for the Legend that you currently have set as your default Legend. In addition, DreamTeam.gg can only show the stats that are currently attached to the Legend’s banner. However, DreamTeam.gg is able to save and show all previously tracked stats regardless of whether that stat is currently connected to the Legend’s banner. The Legend that you have set as your default Legend is the Legend that you see on your screen when the game launches.
In order to see your statistics for the other Legends, you must:
1. Launch Apex Legends
2. Click on “Legends” and select your new Legend
3. Refresh your stats by clicking the “Refresh” button on DreamTeam.gg.