Cluster munitions are bad when you’re an invading army bc some of the explosives fail to fire, endangering civilians who come across them later. Ukraine, however, is using them on its own territory to combat russia who 1) is already using cluster munitions with a greater fail rate than the ones the US is providing Ukraine, and 2) deliberately mines the areas they invade in a way to kill civilians (e.g. setting up a mine to explode if you try to move the corpse of a beloved family dog). So in this case, using the US’s cluster munitions to get russia out is a net positive.
Telegram users have never had privacy. Group chats are completely in the open and private messages are only encrypted if both users turn it on for each conversation—and it’s off by default. I’ve never understood why anyone thinks Telegram is any better than posting anywhere else on the internet.