I have tried it and it's very fun. The most intense was with Lex, who owns YouTube channel Entrancement. Definitely check out his channel, as there are many tickling hypnosis videos. Also, turning on/off ticklishness was one of the first things he experimented with. 😁
We played over the phone a few times. I have to say that I was very much a skeptic at first, but found that I was a very suggestible subject. 😅 All hypnosis is self hypnosis to a point, and you need a lot of trust to be willing to go down this rabbit hole with a hypnotist. Do be careful who you play with, as not all hypnotists play nice. Some like to "drop" you at random and without your consent, which is a big no no in the tist community, unless you're specifically wanting "non consensual" play.
So , I definitely had a lot of fun exploring hypnotic tickling, although I haven't played for a long time.