SBU found a Russian Shahed wreckage showing radiation levels at 12 microsieverts per hour, linked to an R-60M depleted uranium warhead.
Archived version: https://archive.is/newest/https://united24media.com/war-in-ukraine/russia-just-used-a-radioactive-drone-in-ukraine-for-the-first-time-heres-what-we-know-18991
Disclaimer: The article linked is from a single source with a single perspective. Make sure to cross-check information against multiple sources to get a comprehensive view on the situation.
Syria 2015 https://www.middleeasteye.net/news/us-pentagon-confirms-it-used-depleted-uranium-syria
While it is possible DU API munitions have been used in Iran (https://www.cndsalisbury.org.uk/news_items/9279-are-us-warplanes-firing-depleted-uranium-at-iranian-targets) it is certain in my mind that the U.S.-Israeli airstrikes on Iranian oil facilities and resulting toxic black rain and oil spills (https://apnews.com/article/iran-war-black-rain-pollution-d5f67db4a772775c83dfa3fd303cf25d) will cause far more dire public health damage than any DU usage.
The real DU health effects are on soldiers. But since when does the US GAF about their soldiers? suckers and losers, amirite?