Alright so first of all, apologies, I wasn't able to find deHakkelaar's libc.so.6 - I am not sure where it would be located, so I haven't been able to verify it.
However, I did run the installer again and noticed it never showed me a window stating my web address interface URL, so I decided to follow some steps regarding issues I had for my first install
sudo /usr/sbin/lighttpd -tt -f /etc/lighttpd/lighttpd.conf
returned
sudo /usr/sbin/lighttpd -tt -f /etc/lighttpd/lighttpd.conf2023-03-04 12:25:27: (configfile.c.1094) source: /etc/lighttpd/conf-enabled/15-pihole-admin.conf line: 15 pos: 17 invalid character in variable name
2023-03-04 12:25:27: (configfile.c.1151) configfile parser failed at: server.errorlog
2023-03-04 12:25:27: (configfile.c.1154) source: /etc/lighttpd/lighttpd.conf line: 74 pos: 1 parser failed somehow near here: (EOL)
So I opened /etc/lighttpd/conf-enabled/15-pihole-admin.conf and copied the first 15 lines
# Pi-hole: A black hole for Internet advertisements
# (c) 2017 Pi-hole, LLC (https://pi-hole.net)
# Network-wide ad blocking via your own hardware.
#
# Lighttpd config for Pi-hole
#
# This file is copyright under the latest version of the EUPL.
# Please see LICENSE file for your rights under this license.
###############################################################################
# FILE AUTOMATICALLY OVERWRITTEN BY PI-HOLE INSTALL/UPDATE PROCEDURE. #
# ANY CHANGES MADE TO THIS FILE AFTER INSTALL WILL BE LOST ON THE NEXT UPDATE #
###############################################################################
server.errorlog := "/var/log/lighttpd/error-pihole.log"
Could it be simply changing this string would resolve my issue somehow? Seeing as I am getting my error was "line: 15 pos: 17 invalid character in variable name" & sudo systemctl status --full --no-pager lighttpd is giving me Failed to start Lighttpd Daemon.
I think there may be some issue in the installer, as sudo nano /etc/pihole/setupVars.conf has no reference at all to an ipv4 or ipv6 address