BD Project Manager interview questions

First was a call from recruiter, then call with hiring manager, then went through a few more rounds with other people in team. There was a lot waiting time between each round.

I applied for a role online. The bot reached out to me and offered a few options for the interview. About one hour before the interview if was rescheduled, then rescheduled again. Finally, when i got a call from HR they informed me that the job is no longer available in Switzerland. I wonder why these questions cannot be discussed internally before the job is posted and people spend time on application and preparation.