afaik there's actually very little braille out in the world
I've seen a few elevator panels have it, and some floor signs in buildings but that's it. No idea how as a blind person you'd even know there's a damn sign on the wall though, not to mention since it's not exactly standard to have braille lettering on them so it's not like you'd even consider to feel around for it.
And apparently there's very few books available in it too I learned, which I thought was the primary function of it. The demand is so low apparently that it's just not financially viable to print braille versions of books. So it's mostly just textbooks so blind children/teens can study.
However! There are actually braille printers for home use. So you can actually download an e-book / digital copy of a book, and print it out. They cost around 3000 dollars though, lmao.
Also got shown a braille "display". It's got a fuckton of pins in holes which when hooked up to a computer (or smartphone) will create a braille text from what's on the computer screen. I think the biggest could show up to 40 characters at once.
5000 dollars for that beauty of technology capable of rendering a fraction of a tweet.
It's not enough you're blind, they're jewing you out of all of your money too so you can have tiniest, faintest of tastes of what's it like to be like everyone else.