Workouts created on PC not synching across to iOS

When I create workouts (running) on Zwift workout editor, on my PC, everything seems fine until I open Zwift on ATV or my iPad and none of the workouts I have created sync across to these platforms. Is this a recent problem?
Any help please?

Hi @A.S.WEBB

Shuji at Zwift HQ here. Are your workouts based on power (watts / % of FTP) or some other metric? Zwift workouts should be power-based, or they may not be ingested into Zwift.

Please see this how-to on our Support site and let us know if your custom workouts are following protocol?