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 currently still own an LG G5 (LineageOS). This is what an actually removable and replaceable battery looks like and should be like. This is that same phone in water for two minutes. This phone is from 7 years ago. Only phone left on the market nowadays with those capabilities (probably even better) is Fairphone.