iTunes folders on the iPhone

[cambridgehank]

I have over the months created series of iTunes folders and subfolders.  For example, I have a folder called "iTunes Essentials" .  I have subfolders in that folder, "Jazz", "R&B", "Classical", and "Year top songs".  My iPhone 8 Plus sees the top level folder "iTunes Essentials", but not the sub folders.  If I select it, all the songs in the sub folders are played.  I never see the sub folders?  I also play music from the iPhone in the car using Apple CarPlay.  Same thing happens.  Is this normal.  Do I remove sub folders?  Thanks

[someToast]

That’s odd. I’ll have sub-folders two and three levels deep in iTunes and I can still see/play the individual playlists they contain from the Music app on the phone.

[cambridgehank]

Thanks.

Another person suggested resyncing the phone and Mac.  I am currently trying that.  I deleted all the old files and selected all music in iTunes.  I should know in a couple of hours.