Hey there, Saksiri Lertnilkarn
I have escalated your thread, https://free.blessedness.top/en-us/answers/questions/5531966/i-cannot-find-a-prompt-window-on-my-authenticator, and asked for someone to provide you with an update on the status of the problem that has been reported.
I know from experience; it can take some time for Microsoft to resolve problems that have been escalated. This is due to the teams having to investigate and handle the situation, then pass the results onto the agent to pass back to you.
I will keep an eye on the thread to see if you get a response. It may also be worth responding to the thread asking the agent for an update.
Hope this helps,
Nathan