Hi,
please submit a feedback for this in feedback hub app:
https://support.microsoft.com/en-us/windows/send-feedback-to-microsoft-with-the-feedback-hub-app-f59...and then after that, please use this guide to restore it:
How to restore missing High performance power plan in Windows 10
https://thegeekpage.com/restore-missing-high-performance-power-plan/
