How do I reset option bytes to factory default values?
Option bytes can be reset to their default values by selecting the Option Bytes tab, then choosing the 'Reset MCU to Factory Settings' option from the 'Read' button menu. This feature is available for the STM32WBA5/6, STM32U3, STM32U5, and STM32H5 series, and is supported only via ST-LINK connection. After clicking 'Start Factory Reset,' the tool displays each operation's status as PENDING, PASSED, FAILED, ERROR, or ABORTED. (Page 42)
From the official ST Stm32cubeprogrammer Software manual, page 42
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