After debuting in summer 2021, the Microsoft Cortana Scheduler service will close on September 1, 2023. High cost and a lack of users are among the likely causes for Scheduler’s demise, but it wouldn’t be surprising to see it reappear in the future as part of a high-end Office 365 or Microsoft 365 bundle.
https://office365itpros.com/2022/09/07/cortana-scheduler-retirement/