https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-august-6-2023
Well according to the Institute for the Study of War, he is the current commander of the Vostok battalion in Donetsk. A lot of people reject the idea that the so-called rebellion in danetsk and luhansk was a grassroots movement, and was instead orchestrated by the Russian GRU and FSB to whittle away at Ukraine.
Therefore, that would lend credence to the idea that Khodakovsky is in fact a Russian commander, despite the fact that he was born in Donetsk. He did however relocate to Russia after 2018 before returning for the war.
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I am less interested in the details of this particular event, as I am more concerned about the truth. I merely provided alternative sources of information that cross-referenced and corroborated the material in the article as being mostly true.
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As for a Kupyansk, I'm not at all surprised because as you say, there has been give and take along the border for the entire duration of the war. And since Russia still has its inventory a large amount of artillery, any town is at risk of attack.