I had made Junglecat controller cases for my galaxy fold but just got a S23 Ultra and decided to make another for this phone.
I love how perfectly the size of the controllers matches the phone width. It makes it look like one cohesive device!
Speakers, USB and pen are all accessible still.
I am willing to share the STL for free to anyone interested, but if you want to leave me a ‘tip’ you can buy the file from my store for five bucks (Frogcase)
You can usually just add the plain controller rails to any working phone case.
I found a design that worked well, redesigned it to be better and added the controller rails.
I think the rail files are on thingiverse