Cluster munitions can definitely help clear minefields, but they aren't 100% effective for that purpose and will leave unexploded bomblets and mines behind which still pose a hazard. Also, if the cluster bombs are being used to clear mine-fields then they aren't being used to attack Russian troop formations for which they are far more effectively designed. With the extreme shortage of standard artillery ammunition already, this may not be the best use for them.
More disturbingly, Russia has remote mine-laying capabilities now as well. They can use artillery to lay mines in fields that have been cleared, which has already been used to devastating effect on armor that has successfully pushed through minefields only for those cleared paths to be fully mined again on their retreat.
There was a drone video going around a few weeks ago showing the absolute horror of dealing with modern minefields, with Ukrainian troops getting caught in them and having various limbs blown off. Its disturbing and graphic, but I think its important to watch; to honor their sacrifice, and to fully understand the utter depravity and merciless nature of modern war.
The sooner this #### ends the better.