Brother, first of all, you need to read this answer

https://jobsadvisorqa.com/questions/question/no-reply-response-from-qatar-airways-after-receiving-offer-letter-ticket-visa

after that, you should understand that they are facing some issues regarding the MOI status that’s why people from Nepal they are on the waiting list because of that issue. I’m sure you will be traveling soon once they fixed this issue 🙂 Have patience brother and I will also publish the post on my youtube channel (Here)