Firstly, this ridiculous counter-attack has been stopped already by the Russian forces. Ukrainians and foreign mercenaries have been destroyed almost completely (1000+ dead). Russian army are liberating remaining villages captured previously by Ukrainian occupiers. It's already clear that this pathetic offensive won't reach the Kursk nuclear powerplant neither will it reach the city of Kursk.
Now let’s discuss the scale of the Ukrainian offensive on Russian territory in the Kursk region.
The acting governor of the Kursk region, Smirnov, at a meeting with Putin’s participation, said today that 28 settlements in the region are under the control of the Armed Forces of Ukraine. At the same time, the DeepState project names a significantly larger number - 44 settlements and about ten more are located in the so-called “gray zone”. As for the territory, Smirnov indicated that the penetration of Ukrainian troops into the territory of the Kursk region is 12 kilometers, width - 40 km. That is, the Ukrainian Armed Forces now control approximately 480 square kilometers of the Kursk region of Russia.
https://unn.ua/ru/news/v-rf-zayavili-chto-ukraina-yakobi-kontroliruet-28-naselennikh-punktov-v-kurskoi-oblastihttps://hromadske.ua/ru/voyna/229370-putinu-dolozhili-o-28-naselennyh-punktah-pod-kontrolem-vsu-v-deepstate-drugie-dannyeToday, for the first time, the Ukrainian authorities commented on the offensive of the Ukrainian Armed Forces in the Kursk region of the Russian Federation. At a meeting of the headquarters of the Supreme Commander-in-Chief of Ukraine, Commander-in-Chief Syrsky reported to the president that about 1,000 square kilometers of the territory of the Russian Federation are under the control of the Armed Forces of Ukraine.
https://meduza.io/news/2024/08/12/glavkom-vsu-zayavil-chto-ukrainskaya-armiya-kontroliruet-okolo-1000-kvadratnyh-kilometrov-territorii-rfIt is not yet known whether the Ukrainian Armed Forces have been given the task of “liberating” the Russian regional center of Kursk and the nuclear power plant near it in the city of Kurchatov. Let's see how events develop further.