Here’s the relevant documentation text for the command:

manage-bde -status <Drive>

(with rebootcount context)

manage-bde -protectors -disable <Drive> [-rebootcount <integer>] Disables BitLocker protection protectors for a specified drive. When protectors are disabled, the drive is not automatically unlocked or protected at startup, allowing access without requiring a key or password.

manage-bde -protectors -disable C: -rebootcount 3 This disables protectors on drive C: for the next 3 system reboots. On the 4th reboot, protectors will be re-enabled automatically.

Specifies the number of reboots for which the protectors should remain disabled. After the specified number of reboots occurs, the protectors are automatically re-enabled by BitLocker.