It is, Secure boot and the TPM must both be enabled.
If you check Msinfo32 / “System Information” with admin rights, there is a “device encryption” listing that maybhave additional information.
There are rare instances where a device won’t support automatic encryption due to “Un-allowed DMA capable bus/device(s) detected” which requires a registry tweak to work around
Thanks very much. I've been using veracrypt for years, it's good to know that I have another option (especially to simplify things for family members).