A lost passport is read as uncertainty about identity and the permission to move on. Dream tradition links it to feeling unprepared for a transition or unsure who you are in a new setting.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.