CONFIG_TQM823L is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_TQM823L.
Result is shown for kernelversion 5.4.123

TQM823L

configname: CONFIG_TQM823L

8xx Machine Type
└─>TQM823L
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
Say Y here to support the TQM823L, one of an MPC8xx-based family of
mini SBCs (half credit-card size) from TQ Components first released
in late 1999. Technical references are at
<http://www.denx.de/PDF/TQM8xxLHWM201.pdf>, and
<http://www.denx.de/PDF/STK8xxLHWM201.pdf>, and an image at
<http://www.denx.de/embedded-ppc-en.html>.