Keep in mind it's a mix of only giving what's publicly available, flat out refusing, and some cases where it would go against state law to give the info.
Exactly, as I've said in the other thread about this, this is pure political theatre. SOSs are following their state's law regarding voter registration files and blustering about how much they're standing up to Trump as much as their political fortunes allow.
If it's available to the public why can't Kobach get it himself? Optics? Better to have it seen as states take any heat than Trump I would guess.
The optics of an official order and chain of custody are better than having him get them himself through various means.