It had been in the works for a while, but now it has formally been adopted. From the article:
The regulation provides that by 2027 portable batteries incorporated into appliances should be removable and replaceable by the end-user, leaving sufficient time for operators to adapt the design of their products to this requirement.
Water resistant devices are a thing we figured out in the 70s. There have been WR phones since before integrated batteries even became a thing. Even before Apple made the iPhone. It’s not a question of if it can be done. It’s a question of if enough people can be educated into preferring a WR phone, because It costs a few extra bucks to produce WR phones. And when they complete against non WR phones they always lose. Integrated batteries made the gap smaller, at the cost of making the device less repairable/maintainable.