It certainly could be interpreted as contempt of court but in practice Apple has hundreds of vague rules in their developer policies and they use them on a dail

It certainly could be interpreted as contempt of court but in practice Apple has hundreds of vague rules in their developer policies and they use them on a daily basis to block apps or updates just because they feel like it. They would have no difficulty constructing a retroactive excuse for banning Epic (and all their customers, as they threatened previously) from the store.