Yes, it doesn’t matter what licence type you have or if you have no licence at all. If you own a motorbike in the UK, you will need to insure that bike.
Your options for insuring a motorcycle without a licence include declaring it SORN so that the DVLA know that is off the road and not being used. If you’re planning on learning to ride and want to get insurance for a bike before you get your provisional licence, why not get a quick easy temporary motorbike insurance policy with Tempcover. It covers you to ride the bike whilst you’re learning but there are no long term commitments, so if things change, you’re not tied into an agreement.