Apple Developer interview questions

Received mail from apple for software Engineer role. Later they schedule the interview with hiring manager Ask about product i am working on? While explaining the details, seen interviewer being sleepy and not able to concentrate! Whats the point of such interview? When i ask for feedback, they wont provide.. How will they provide feedback when interviewer was sleepy!

3 rounds. 2 Technical and 1 with the manager. Technical questions are of medium difficulty but they dive deep into extension questions which can get difficult depending on your domain knowledge.