Also can get it from a can of chickpeas. The liquid already in the can is aquafaba
Also for best results, looking up “[dish] aquafaba recipe” will often work a bit better than 1:1 substitution because it can sometimes benefit from slight ratio changes of other ingredients. Though 1:1 substitution will still work
I assume you’re joking, but in case you are not, the can water wasn’t changed. People just did not know they could use it like this