How you know the air raid siren in Ukraine while Biden was there was pure propaganda to make Biden look tough.
If there would have been an actual raid siren that went off unexpectedly, the Secret Service would have immediately jumped into action and moved Biden to a secure location. By staging this completely bogus stunt, the WH made the SS look completely inept. If the MSM did their job, they'd ask the head of the SS why they didn't remove Biden immediately. Their only answer would be that there was no danger because it was staged.