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.
I think the goal here is to make people not change devices every two years generating e-waste in the process. At least not for the battery. There’s not much difference between an iPhone 12 and 14 in regards of power, most of us could happily use the 12 for longer with replacement batteries.