The partisan movement during the war covered many regions of the country.

The partisan movement during the war covered many regions of the country. On the territory of which region did the partisan detachments not operate?

You should at least clarify what kind of war we are talking about.
If about the war of 1812, then the partisans did NOT operate on the territory of, for example, the Tver, Ryazan and Tula regions, Napoleon’s army did not reach them, as well as the Vladimir and Bryansk regions.

If we are talking about the Great Patriotic War, then the options are suitable:
Yaroslavl, Ryazan, Tambov, Lipetsk (the Germans reached Yelets, they were quickly driven out), Volgograd (steppes), Astrakhan, Kalmykia, North Ossetia-Alania (reached, but were soon thrown back), Ingushetia (the same thing).