It is common for military forces to wildly exaggerate claims of enemy equipment destroyed. During the NATO strikes against Serbian forces in 1999 they claimed to have knocked out hundreds of armored vehicles but in reality mostly hit decoys or caused only minor damage.

https://www.newsweek.com/kosovo-cover-160273

To be clear, I am not trying to justify Russian lies or imply any sort of moral equivalence. Just pointing out that you can never take such claims at face value.