According to a DigiTimes report, the chairman of Epistar, a manufacturer of microLEDs purportedly working closely with Apple, claimed that smartwatch vendors are "showing an interest" in microLED technology. However, volume adoption will take a couple more years at least.
https://www.notebookcheck.net/Apple-may-ditch-OLED-and-introduce-microLED-powered-Apple-Watches-but-they-re-at-a-least-a-few-generations-out.484913.0.html