You have entered the comedy area.
Belgium has banned those types of games outright while some places are saying lootboxes are considered gambling. Ratings boards are doing the bare minimum though, with them just having a small side note of "May contain in-app purchases" which contain everything from DLC, MTX, to lootboxes.The entire F2P mobage market really needs to be regulated by governments or something at this point, it's predatory as shit.
At least EA has dirtied the word thanks to Star Wars Battlefront II's horrendous inception. More work definitely needs to be done, of course, but all of the industry's worst have started out in the mobile market, where it's a sprawling cesspit of slop. So if there's any need for regulation, it needs to all start in the libertarian paradise that is the mobile market.