Achievments in universe

Silly thought that stuck with me today.

Is there any explanation for achievments in universe? Like Commander has a little notebook where he counts numbers of killed krait or centaurs? 🙃

I understand that they are mostly for gameplay purposes, but in my imagination he stops at that bar in Divinity Reach once in a while and shows everyone his progress. On the other hand most of the side quests are done as collections/achievments so there must be some way for him to track these things.