My family knows where to find my recovery phrases and other pieces of information to recover all my coins, but they don't have a copy of anything in their hands. There is no reason for them to have copies of the seeds for cold storage. They know what they have to do and where to look for the essentials for recovery if one day I don't come back home. That's it. My family isn't interested in Bitcoin, only I am. I am sure they will gladly convert in into fiat one day when I am gone.
Its a good thing that family members should also be aware of what you are currently doing so that they will also start to learn and engage in it, and definitely can access all what you have been trying to save for them while you are still alive. Otherwise, all your hard earned coins will only be converted into fiat because they don't have the interest to continue what you have been doing. Although its not bad but they could have made it grown and benefit it more in the future.