Ugh, I feel your pain. I went through the exact same thing last year when my partner and I were trying to divvy up house expenses. We spent way too long trying to figure out if there was some hidden button in the app, but turns out you're definitely not missing anything. It is super frustrating that they dont have a native way to share a live cart yet. We ended up just taking turns manually entering items, which was such a headache. Honestly, finding a workaround saved my sanity. Once we started using a third party tool for our lists, it felt like a total game changer and things have been running so much smoother since. I've been using Easy Cart Share to send my grocery lists to my roommate, and it's honestly a lifesaver.