Thank you for your reply.
When I open my playlists either in Music or iTunes on my laptop (Windows 10) there is indeed a BPM column but it is empty (shows 0 for all songs). It seems as if the BPM data is absent. I also tried using a few 3rd party BPM analyzer softwares but none of them were able to access these playlists as they are based on songs from the Apple Music cloud and all the songs in these playlists are DRM protected.
I'm wandering if there is a way for Apple to generate the BPM data for the songs in the Apple Music cloud so users would be able to use it for whatever purpose they wish, for example sorting a playlist by its songs' BPM...
Thanks again