Did courts not review this? I'm curious which states are alleged to have done this illegally (and how that would've affected the outcome) because for example I thought I saw it was upheld in Pennsylvania:
https://apnews.com/article/pennsylvania-mail-voting-ballots-...
I haven’t been specifically following the updates, but I haven’t seen the executive vs legislative distinction challenged or decided in any court. I assumed it would be but I haven’t seen anything. The linked article seems to be about a technicality related to envelope formatting, not about who can change the election process.