It's a very difficult process to turn on and isn't something that happens automatically. You must flip the bit using the SSD manufacturer's tool, reinstall Windows, and then enable BitLocker. Even then, it only works with a handful of SATA SSDs and maybe 2 NVMe SSDs with 1 or 2 motherboards.
I knew something was fishy when I enabled Bitlocker on an OPAL compliant SSD and it took a few minutes to encrypt it. OPAL drives are supposed to be encrypted by default, and I expected Bitlocker to use that, but it didn't. If only one specific set of hardware is needed, why bother?
