This is most probably because Windows 7 doesn't support NVMe pass-through functions, which are available since Windows 10.
Alternatively you might try to install some NVMe driver (e.g. Samsung) which supports this functionality.
It seems to support dedicated NVMe functions for this controller on Win7.
Can you please go into CDI menu Function - Advanced Feature - USB/IEE1394 - and disable all SCSI_NVME_TRANSLATION items (JMicron, ASMedia, Realtek) ? Then restart CDI and check if the Crucial drive is found. If not, try to enable them one by one until it's found. Please let me know which of those items needs to be enabled so that it's found.