That still doesn’t explain why you can’t even start typing until that check proceeds. You could condition the outbound request from being processed until that’s the case. But preventing from typing seems like it’s just worse UX and the problem will fail to appear in any metrics you can track because you have no way of measuring “how quickly would the user have submitted their request without all this other stuff in the way”.

Said another way, if done in the background the user wouldn’t even notice unless they typed and submitted their query before the check completed. In the realistic scenario this would complete before they even submit their request.