default or selected kernelversion does not have config value CONFIG_ZX_TDM.
Result is shown for kernelversion 6.9.9

ZTE ZX TDM Driver Support

modulename: zx-tdm.ko

configname: CONFIG_ZX_TDM

Linux Kernel Configuration
└─>Device Drivers
└─>Sound card support
└─>Advanced Linux Sound Architecture
└─>ALSA for SoC audio support
└─>ZTE ZX TDM Driver Support
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Say Y or M if you want to add support for codecs attached to the
ZTE ZX TDM interface

source code:
sound/soc//zte/zx-tdm.c