You realize there is a different curriculum for each subject at each level, right? You realize that a compilation of all curricula for any given subject in a district would be about as fat as a phonebook (if anyone remembers those), right? How many parents are actually going to pore through it all, point by point? You realize that the very great majority of parents are not educated, trained, or experienced in curriculum development, right?
In my district, any parent is more than welcome to go through any curricula they want. It's all online. Every parent gets a summary of the curricula of my classes at the start of each academic year. Available in several languages. Any parent can get a copy of my lesson plans for any lesson at any time. Any parent of any of my students is welcome to visit any of my classes, no prior notice required, and I make it clear I am available to meet with them and discuss their children's progress in class at their convenience.