“Russian artillery does not have the range to hit a HIMARS tell.”
Kharkiv is near the Russian border.
Which is why it is unlikely that there are HIMARS systems in that area. The US does not want HIMARS rockets used on targets inside of Russia, and in the Kharkiv area almost all targets are within howitzer range from the Ukrainian front lines.
There have been no reported deep strikes in the Kharkiv area unlike the HIMARS strikes seen in the Donbass and Kherson areas.