Geolocated footage shared on Sept. 21 and analyzed by the Institute for the Study of War indicated that Ukrainian armored vehicles advanced south of the anti-tank ditches breaching the Russian tri-layered defense, and engaging in limited combat just west of Verbove on the southern Zaporizhzhia front.
The headline kind of implies that they’re in the open now.
Looking at both ISW’s and deepstatemap.live’s map of Russian fortifications, I think that there is one more trench from Verbove to Pshenychne.
After that, there are weaker, somewhat-discontiguous defenses that I believe were described as being for staging and command that run north of Romanivske.