default or selected kernelversion does not have config value CONFIG_MCDX.
Result is shown for kernelversion 5.15.113

Mitsumi CDROM support

modulename: mcdx.ko

configname: CONFIG_MCDX

Linux Kernel Configuration
└─>Device Drivers
└─>Old CD-ROM drivers (not SCSI, not IDE)
└─>Mitsumi CDROM support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Use this driver if you want to be able to use your Mitsumi LU-005,
FX-001 or FX-001D CD-ROM drive.

Please read the file Documentation/cdrom/mcdx.

If you say Y here, you should also say Y or M to "ISO 9660 CD-ROM
file system support" below, because that's the file system used on
CD-ROMs.

To compile this driver as a module, choose M here: the
module will be called mcdx.

source code: