That’s my understanding. I recall reading that Ukraine has argued this isn’t much of an issue as the south and East of Ukraine are already littered with a huge amount of UXO and mines so it really doesn’t change the calculus in terms of cleanup.

Yes, since 1979 UXO (mostly cluster munitions there) caused 64000 casualties and 25000 amputations in just Cambodia

Since 1974, 50000 casualties in Laos

This kind of UXO are especially a risk for children