U.S.- and UK-supplied missiles that may have required NATO personnel to aim and/or fire

"May" is the wrong word here. The word you're looking for is definitely. The Ukrainians themselves have admitted as much on their Telegram channels from what i've seen. They complain that they have to wait too long for US to authorize the next strikes because the only way that they can employ these missiles is with NATO satellites providing all of the targeting and guidance in live time. That means that Ukraine is doing nothing but pressing the button, everything else is done by NATO. The Russians also said this would be the case in advance and they are 100% right when they say the use of these missiles now is a direct attack on them by NATO. Even the pretense of a proxy has essentially been dropped and both sides know it, it's only the western media that is still trying to gaslight the world.