can see play list in ITunes on my Windows PC, but it doesn't show up on my Iphone 14 even when both devices are signed on to Itunes

Hi stevefromlemont,

If you see a playlists on your PC that doesn't show on your iPhone, make sure that both devices are signed in to the same Apple ID for Apple Music and that Sync Library is enabled in your Music settings on iPhone and in Music Preferences on PC.

Sync Library is needed to be enabled on both devices for your music to sync automatically.

Check out how to enable Sync Library in the article below:

Use Sync Library to access your music library across your devices - Apple Support

"How to turn on Sync Library on your PC

In iTunes for Windows, Sync Library is called iCloud Music Library. Learn how to turn on iCloud Music Library in iTunes for Windows.

How to turn on Sync Library on your iPhone or iPad

1. Make sure that your iPhone or iPad is signed in with the same Apple ID that you use with your Apple Music subscription.
2. Go to Settings.
3. Tap Music.
4. Turn on Sync Library.
5. 
6. Turn on Sync Library on your other devices."

Regards.