On #iOS (18) there ought to be a way to [Speak Text] time (easy, done) after alarm goes off via “Shortcuts” application!
Ideally spoken time would be alarm action/tone.
Setting the alarm from input is easily done. Combining the 2 needs work.
Could get the time for “alarm”; instead of [Create Alarm For], would calculate the time difference (wrt current time; already done previously for its own use) to [Wait] before “speak-time”.