default or selected kernelversion does not have config value CONFIG_NFS_USE_NEW_IDMAPPER.
Result is shown for kernelversion 6.2.5

Use the new idmapper upcall routine


Linux Kernel Configuration
└─>File systems
└─>Network File Systems
└─>Use the new idmapper upcall routine
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
Say Y here if you want NFS to use the new idmapper upcall functions.
You will need /sbin/request-key (usually provided by the keyutils
package). For details, read

If you are unsure, say N.