Family Share of Expansion packs

I understand not being able to share credits, coins, etc with family share. But if I buy an expansion pack or get a code to add a bonus function etc for a game that has family sharing, the expansion pack/ bonus code should be allowed for family sharing. Any workarounds? Playing exploding kittens and really enjoying the fact that we can all play without having to all buy the game in my family, but hate the fact that because I bought an expansion pack, my kids can't use it when they are playing.