opkg.config po wklejeniu twoich linków i edycji w Notpad++  :

src/gz openwrt_23.05-SNAPSHOT_base https://downloads.openwrt.org/releases/ … _24kc/base
src/gz openwrt_23.05-SNAPSHOT_packages https://downloads.openwrt.org/releases/ … c/packages
src/gz openwrt_23.05-SNAPSHOT_routing https://downloads.openwrt.org/releases/ … 4kcrouting
src/gz openwrt_23.05-SNAPSHOT_telephony https://downloads.openwrt.org/releases/ … /telephony

src/gz gargoylepl_base https://dl.eko.one.pl/gargoyle-pl/1.15/ … _24kc/base
src/gz gargoylepl_kernelspecific https://dl.eko.one.pl/gargoyle-pl/1.15/ … c-5.15.173

dest root /
dest ram /tmp
dest plugin_root /plugin_root
lists_dir ext /var/opkg-lists
option overlay_root /overlay

root@Gargoyle:~# opkg update
Downloading package list for gargoylepl_kernelspecific source...
Package list for gargoylepl_kernelspecific downloaded successfully.

Downloading package list for gargoylepl_base source...
Package list for gargoylepl_base downloaded successfully.

Downloading package list for ▒ source...
WARNING: Could not retrieve package list for ▒.

root@Gargoyle:~#

W dodatkach jest tak:

Źródła dodatków:
Nazwa   
openwrt_23.05-SNAPSHOT_base
https://downloads.openwrt.org/releases/    Systemowe
openwrt_23.05-SNAPSHOT_packages
https://downloads.openwrt.org/releases/    Systemowe
openwrt_23.05-SNAPSHOT_routing
https://downloads.openwrt.org/releases/    Systemowe
openwrt_23.05-SNAPSHOT_telephony
https://downloads.openwrt.org/releases/    Systemowe
gargoylepl_base
https://dl.eko.one.pl/gargoyle-pl/1.15/ … _24kc/base    Systemowe
gargoylepl_kernelspecific
https://dl.eko.one.pl/gargoyle-pl/1.15/ … c-5.15.173    Systemowe