Let's try the first example which shows up in 'latexdef --help'

$ latexdef chapter
Duplicate specification "Find|F!" for option "find"
Duplicate specification "no-list-def|no-L" for option "no-l"
Duplicate specification "no-list-def-all|no-LL" for option "no-ll"
Duplicate specification "environment|e=s" for option "environment"
Duplicate specification "pgf-Keys|K" for option "pgf-keys"

\chapter:
undefined


Reproducible: Always

Actual Results:  
As described. Actually a response looks pretty much the same for any macro I am trying.

Expected Results:  
A requested definition displayed on stdout.

texlive-base-20230311-85.fc41