That's another aspect of the regulation but as far as I can tell (from skimming the actual mandate, or the other summaries I found of it) it's doing both. The release itself says
> Starting in 2027, consumers will be able to remove and replace the portable batteries in their electronic products at any time of the life cycle.
Interesting that it's also introducing limits on EV carbon footprints, but that's not to the exclusion of mandating replaceable phone batteries.