I figure this is to support the faith that Russia is running out of ordnance, which holds strong since the spring of 2022, when it was first proclaimed [1]. So Russia has to use Iranian drones and missiles, Korean shells, and even some tyres off Alibaba on their vehicles [2].

1. https://newsinfo.inquirer.net/1573535/russia-running-out-of-...

2. https://www.tyrepress.com/2022/03/are-tyre-issues-hampering-...