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.
even fairly modern ones are slick, LG G4 (ok not exactly modern) is light and thin and with replacable battery. Gigaset smartphones are quite the bricks but it’s actually quite hard to open the batt compartment, that’s how well they’re fitted.