Cloud Status Waiting or No Longer Available

Years ago I moved my iTunes Library to Spotify by online service TuneMyMusic.com. Now I moved my Spotify Library back to Apple Music by the same service. My Library contains thousands of tracks. Some of these tracks now are being shown in Music.app in grey and in column Cloud Status it says for these greyed tracks „Waiting“ and for some other tracks "No Longer Available". – May be the right wording in English could differ; I am using German language. How can I for all these tracks check if there on Apple Music or in the store the respective track are available? And if so, replace these tracks by the tracks being available?