Hello,
Thank you for posting in Microsoft Community forum.
Based on the description, I understand your question is related to dual boot.
Windows 11 Home does not officially support BitLocker, it only support "Device Encryption", Device Encryption is a Windows feature that enables BitLocker encryption automatically for the Operating System drive and fixed drives. It’s particularly beneficial for everyday users who want to ensure their personal information is safe without having to manage complex security settings.
When you first sign in or set up a device with a Microsoft account, or work or school account, Device Encryption is turned on and a recovery key is attached to that account. If you're using a local account, Device Encryption isn't turned on automatically.
Try run below command turn off:
manage-bde -off C:
manage-bde -status
Have a nice day.
Best Regards,
Molly