So... is Estab-Life: Great Escape finished or not?
NO, it is not finished.
Why?
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
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Synopsis
In a future Japan divided into walled-off city-states, each controlled by an AI, life is rigidly structured and emigration is restricted.
A group of high school students, leading double lives, operate as "Extractors."
They secretly help people escape their assigned cities to find a more suitable life elsewhere.
This risky activity puts them in direct conflict with the AI moderators who are determined to maintain order and their vision of a perfect society, leading to increasing danger for the group and their clients.