Toyota does that. It there a law that requires Toyota to do that or does Toyota do it by its own will?
Governments are pushing BEVs, but are they preparing any environmental framework for mass battery disposal? If companies do not want to do anything until they are not required to, they won't, till scandal breaks out. See plastic (not solved yet), diesel, not to name all the other things in various industries.
there are both laws and all manufacturers do it because they make money on it.
it is really a very much solved problem thanks to Toyota, now Tesla and few others sellings total over 20m+ batteries across the globe, which means they are being recycled everywhere.