I’d say kissing is very much a case by case sort of thing. There can be all sorts of reasons a provider might not want to kiss, even if it’s listed. The main one, I’d imagine, is dental hygiene. Let’s be honest, plenty of people have dreadful oral hygiene, and that alone could put someone off kissing just anyone. They might still list it as something they’re open to, but only with the right person or a genuine connection.
I don’t think there’s anything wrong with asking beforehand to get their take on it. That said, if they agree and then don’t seem keen when you meet, I’d assume either you had bad breath or they simply weren’t that into you. Kissing can feel quite intimate, after all.
Personally, I don’t kiss who I hire or expect it, but I can see why it matters to some people.