Hello there,
Which version of Windows are you using? Home edition of Windows won't support BitLocker and you won't be able to use it.
How long are you facing this issue? I can see that you have tried most of the troubleshooting steps.
Have you made any recent updates that you are aware of on this device? If so try uninstalling them and check if this sorts out the issue
A few common causes include outdated drivers, bugs in your Windows that make BitLocker unavailable, and the difference in the encryption algorithm as well as your Windows versions.
Similar discussion here https://learn.microsoft.com/en-us/answers/questions/664584/the-bitlocker-encryption-on-this-drive-isnt-compat
Hope this resolves your Query !!
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