Word is that
it's possible to play NG+ on 1.0 disc with uncensored outfits:
- Connect PS5 online and update Stellar Blade
- Start NG+
- Disconnect PS5 from online
- Delete Stellar Blade installation (but NOT the save file)
- Install Stellar Blade 1.0 from disc
- Resume NG+
Apparently the NG+ outfits are on the disc and save data remains compatible to previous versions, the Day 1 patch seemingly just making NG+ accessible from the main menu. I'd be cautious, however, about running into bugs and corrupting your save file when playing NG+ in this unintended way on 1.0, so you may want to create a backup of your save file just in case.
With that, there's been evidence of further outfits having been censored:
First, it has been recognized that the bikini "Blue Monsoon" is censored between 1.0 and Day 1, just in a manner that's been passing people's recognition at a glance. As it turns out, the outfit is widened very slightly to cover more of the cleavage and ass, or perhaps because concaving fabric is too lewd.



Second, the NG+ variant of "Cybernetic Bondage", called "Autonetic Bondage", censors the cleavage in similar fashion to the base outfit between 1.0 and Day 1, which is no surprise. Something new to me, though, is that variants actually can have model differences rather than just being recolors, given the open navel on this one.

Third, it appears that the lingerie "Black Pearl", the final reward for acquiring hidden collectibles, has a more revealing version according to an image asset. The screenshot clearly comes from where you get the hidden collectible rewards, but we have yet to see whether this outfit still exists as one that can be equipped, or if evidence of it only remains in a separate asset in similar fashion to the bare-legged version of the Chinese dress "Moutan Peony". I suspect that this was originally intended to be the NG+ variant of "Black Pearl" as a spicier reward for getting all the hidden collectibles a second time, but I'll have to see for myself to confirm once I beat the game.
I found much of this new information from this Twitter user: