So... is Dolls' Frontline 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 post-World War III world ravaged by conflict and environmental disaster, private military companies employ combat androids called T-Dolls to maintain order. These T-Dolls are powerful, but require human commanders to function strategically.
A former T-Doll manufacturer, Sangvis Ferri, goes rogue, its AI turning against humanity and seizing control of its factories. This leads to a robot invasion that threatens what remains of civilization.
Griffin & Kryuger, a paramilitary organization, stands as humanity's last line of defense. An elite T-Doll team, Anti-Rain, is tasked with uncovering the reasons behind Sangvis Ferri's rebellion, but they are ambushed and scattered.
A new Griffin commander, Gentiane, is assigned the crucial mission of finding the members of Anti-Rain and recovering vital data before Sangvis Ferri can obtain it. The fate of humanity may rest on her success.