You'd have to ask your insurere whether you are currently benefiting from any discount for not having made a claim of this kind. The answer is probably "no", but only your insurer can give you a categorical answer. If there's no no-claims bonus I doubt very much that you will suffer any "propensity to claim" uplift to premiums in the future. A single claim is not a "propensity".
Plus, there is no point in buying a policy with freezer contents insurance if you are never going to make even one claim for loss of freezer contents; for fear of premium increases; you would do better to buy a cheaper policy which did not include this.