You have an actual source? Some law, some FTC statement, or something in the federal register?
I just did a search, and found nothing, and honestly, the top result was me doing the search and finding that federal law does NOT require it, and California doesn’t require it either (and california hasn’t changed their statements on either).
From my most recent search, I actually see many sites that claim it’s federal law now, but absolutely none cite any source. I’m sure it wasn’t the case for the 2018 MY (as has been pointed out), did the IRA change it and it’s not a new 2023 warranty? That would make sense, but I can’t find the text.
Other options are refurb pack and junkyard pack.
Looks like that one isn’t really serviceable, so you can do the junkyard route. I can get a EV fortwo on copart with some crash damage for a buy it now of $2500…that may be a reasonable way to get a replacement battery.