Yes — and the evidence base has grown substantially. Across 49 meta-analyses covering 261 randomized controlled trials, hypnosis has been shown to be effective for anxiety, IBS, pain management, surgical procedures, and much more. As an example, for anxiety specifically, people receiving hypnosis showed greater anxiety reduction than the large majority of those who didn't receive hypnosis, with even stronger results at follow-up — meaning the changes tend to hold and deepen over time.
Beyond anxiety, research supports hypnotherapy for performance enhancement (including performance anxiety in sports and public speaking), habit change, pain management, and working through fears and phobias.