Wonder how often Apple Music library synced on apple devices.

I made a smart playlist to add least played music within designated volume on Mac Music app to play them on Apple Watch.

If it works as I intended, it should sort least played songs and keep updated so I can keep listening songs that I almost forget I added to my library.

But I found that each songs play counts are not synced at realtime and that makes playlist on MAC and other mobile devices are different. I can understand syncing realtime is not almost possible.

I wanna know how often Apple Music library on multiple devices are synced and there is any way to force-sync those devices.