Samsung users running Android 9.0 Pie will have to wait a bit longer for the One UI 2.0 update. According to a notification on the Samsung Members app, the rollout will be 'slightly delayed.' This only applies to users based in India, and it is unclear if other regions will also be affected.
https://www.notebookcheck.net/One-UI-2-0-update-postponed-for-several-devices-in-India.463435.0.html