Also known as "Lefty Wikipedia". 
You have no proof Russia has been using Cluster Bombs.
Only speculation.
“The cluster munition attack with the highest known civilian casualties occurred on April 8, 2022, when Russia launched a Tochka-U ballistic missile equipped with a cluster munition warhead at a crowded train station in the eastern city of Kramatorsk as hundreds of people were trying to leave the area. A detailed Human Rights Watch investigation found that the attack killed at least 58 civilians and injured over 100 others.
The CMC’s annual report on the use of such weapons around the world found that Ukrainian forces appear to have also used cluster munitions at least three times, adding that there was no evidence of Kyiv acquiring cluster munitions from other countries this year.
“Russia’s extensive use of internationally banned cluster munitions in Ukraine demonstrates a blatant disregard for human life, humanitarian principles and legal norms,” said Mary Wareham, one of the report’s co-editors.”
https://www.dw.com/en/russia-uses-cluster-bombs-extensively-in-ukraine-report-says/a-62927491
Also known as "Lefty Wikipedia".