Cross-team communication is difficult because each group sees only part of the system. Teams may use different vocabulary, plan on different timelines, and optimize for different outcomes. Begin with the shared objective, then make each team's constraints, responsibilities, and decision authority explicit.
Dependencies need more than awareness. Define what will be delivered, by whom, in what form, by when, and what happens if it changes. Use a shared source of truth and a predictable communication rhythm so important information does not remain inside one team's meetings or private channels.