Apps missing from icloud

All the apps I had are missing from iCloud I even backed them up. I was also asked b4 my password on my phone for some reason it worked my password but it did not work when I tried to put it in to get acess to re-download all my iCloud info . I never really thought much about the iCloud I always had enough room on my phone but when I went to look from my windows computer all my back up was gone I had mail and pics a few notes where are all the other app. I’m cofused