creating multiple apps from same codebase

my requirement is

  1. create multiple apps for event organizers - every app is exactly the same except the part where each app name is of that particular organizer name, app icon and can see only the event created by that organizer

  2. now i want to publish multiple apps in this way , all same code only different is their name

  3. now if i want to make changes, i want it to reflect it to all these apps (all Published apps)

how can i do this

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