Many classically trained pianists are interested in learning jazz piano. Classical training will help physically but not a lot mentally. Your ability to play notes, chords, runs, etc, will all be very useful and put you ahead of the learning curve.

That said, jazz is mentally a fundamentally different way of approaching music. Some classical people think that just like Bach sounds different than Debussy, jazz is just a different sounding kind of music. It isn’t. It’s a different way of approaching music, primarily focusing on chord progressions and how to improvise over them.

I could not have come as far as I have given the given time I’ve spent without the classical training. So you will benefit from all of that training. But be prepared to learn a new method of making music. For me it’s been one of the most rewarding journeys I’ve undertaken.