They dont say, as in, they don’t make an offer or push for you to give a number first?
I've started to do this. I tell them that it's best if they decide what I'm worth. I then ask for a salary band (so I know if I'm wasting my time or not).
it only happened once that they didn't say a number first and I haven't had the willpower to stand up. fwiw, I got an offer and it was good enough1👍