I'm going to sound ridiculous, but I've been importing my litter.
I think it can be found in the US, but with the exchange rate it's cheaper to grab a few bags when I visit family. It lasts forever.
It's this one, the blue bag.
https://odourlock.com/en/
My cats insist on using the same litter box. One of them has to eat high fiber food, so they both eat that... They 💩 like tigers, despite being 7-pound little cuties.
All that to say, that litter CLUMPS, so that I can clean it daily, and then once a week, I clean the box, put back the used litter, and top it up with fresh. Zero smell.
Oh, and the cats like it too (one of them is picky about the texture).
Picture of the pooping machines:
Prior to that discovery, I was using Dr. Elsey's , the red box (again, one cat is picky - easier to get her what she wants than to deal with her trying to go elsewhere).