NO, it is not finished.
We found unfinished core content:
Zoku thermae romae (Sequel)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Thermae Romae Novae follows Lucius, a Roman architect struggling with creative block and facing unemployment. His friends suggest a bathhouse visit to alleviate his stress.
While at the bathhouse, Lucius discovers a mysterious tunnel that unexpectedly transports him to modern-day Japan, specifically to Japanese bathhouses.
Inspired by the advanced bathing technology and culture he witnesses, Lucius returns to ancient Rome with a renewed sense of purpose. He attempts to adapt these modern concepts to his Roman designs, often with amusing and somewhat imperfect results.
The anime focuses on Lucius's journey as he tries to revitalize Roman bathhouse culture using his newfound (and sometimes misunderstood) knowledge, hoping to regain his reputation as a skilled architect.