Command from documentation:

cryptsetup open dev/nvme0n1p1 nvme0n1p1_encrypted

Actual results: Device dev/vme0n1p1 does not exist or access denied.

Expected results: Device is opened and available for use

Missing "/" at start of device path.

Link to documentation:https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/security_hardening/encrypting-block-devices-using-luks_security-hardening#:~:text=Open%20an%20encrypted%20LUKS%20partition%3A

and same for RHEL 8:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/security_hardening/encrypting-block-devices-using-luks_security-hardening#:~:text=Open%20an%20encrypted%20LUKS%20partition%3A