CONFIG_DISPLAY7SEG is not available for thedefaultarchitecture x86.
Result is shown for architecture sparc64
default or selected kernelversion does not have config value CONFIG_DISPLAY7SEG.
Result is shown for kernelversion 5.4.123

7-Segment Display support

modulename: display7seg.ko

configname: CONFIG_DISPLAY7SEG

Linux/UltraSPARC Kernel Configuration
└─>General machine setup
└─>7-Segment Display support
In linux kernel since version 2.6.12  
This is the driver for the 7-segment display and LED present on
Sun Microsystems CompactPCI models CP1400 and CP1500.

To compile this driver as a module, choose M here: the
module will be called display7seg.

If you do not have a CompactPCI model CP1400 or CP1500, or
another UltraSPARC-IIi-cEngine boardset with a 7-segment display,
you should say N to this option.

source code:
depends
CONFIG_PCI