Business systems from the 80s used to automatically convert everything name related to caps. It made it easier to do string matching which was generally case sensitive in the DB. It also made data entry easier as you just turn capslock on and type.
No so much formal as lazy semi-formal.
It’s not well explained for sure but judging by the names of the cookies I bet those store the consent (opt in/out) values for the other tracking options. Another way of putting it would be those are functional cookies related to the cookie consent form itself so that you don’t have to re-select consent options every time you visit the site.