The bees were on a different lower down roof from the main roof (which is the one that burned). The article notes that bee wax melts at 70C and they didn’t see any of that under the hives, so they know temperatures stayed below that. So the bees were likely only exposed to some smoke and maybe some slightly elevated temperatures.
I think there may be more to Ukraine’s abstention than being “too busy with their own shit,” probably they don’t want to annoy the US govt and risk having military aid further reduced.