ncurses-6.2-1.ppc and ncurses-devel-6.2-1.ppc are missing ncurses6-config_32 and ncurses6-config_64, so ncurses6-config is a broken symlink.
$ rpm -ql ncurses ncurses-devel | grep -e -config | xargs ls -ld
lrwxrwxrwx 1 root system 18 Sep 11 14:56 /opt/freeware/bin/ncurses6-config -> ncurses6-config_64
-rw-r--r-- 1 root system 3833 Mar 11 2020 /opt/freeware/man/man1/ncurses6-config.1
lrwxrwxrwx 1 root system 38 Sep 11 14:55 /usr/bin/ncurses6-config -> ../../opt/freeware/bin/ncurses6-config
lrwxrwxrwx 1 root system 41 Sep 11 14:55 /usr/bin/ncurses6-config_32 -> ../../opt/freeware/bin/ncurses6-config_32
lrwxrwxrwx 1 root system 41 Sep 11 14:55 /usr/bin/ncurses6-config_64 -> ../../opt/freeware/bin/ncurses6-config_64
$ ls -ld /opt/freeware/bin/ncurses*-config*
lrwxrwxrwx 1 root system 18 Sep 11 14:56 /opt/freeware/bin/ncurses6-config -> ncurses6-config_64
$ rpm -q ncurses ncurses-devel
ncurses-6.2-1.ppc
ncurses-devel-6.2-1.ppc
$
------------------------------
Edward Davignon
------------------------------