Please don't be disappointed, be positive that at least you are able to sponsor the parents in 2019. Now it is totally luck because it's on lucky draw and only 4-5% lucky will get the chance to sponsor their parents. I am really sorry to know about your father,may GOD give you all the strength to bare this irreparable loss.
Being you are in the last group of applications submitted in 2019 and due to overall delay due to pandemic and further second wave in Canada, Ontario have seen a lock down with stay at home bla bla so many reasons the overall process has lost. Still there are applications pending from April end and May 2019 due to one or the other reasons. Now in the mean time you try to process for refund the fees you paid for your father. Hopefully the application will be processed within 2 years period still 5 more months. Recently I have seen some applications have been picked up and completed within couple if months. All the best!