I've tried updating from the console and from the visual interface. I get the following output from both:
root@OpenWrt:~# opkg update
Downloading https://downloads.openwrt.org/releases/23.05.0/targets/mediatek/mt7622/packages/Packages.gz
*** Failed to download the package list from https://downloads.openwrt.org/releases/23.05.0/targets/mediatek/mt7622/packages/Packages.gz
Downloading https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/base/Packages.gz
*** Failed to download the package list from https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/base/Packages.gz
Downloading https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/luci/Packages.gz
*** Failed to download the package list from https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/luci/Packages.gz
Downloading https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/packages/Packages.gz
*** Failed to download the package list from https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/packages/Packages.gz
Downloading https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/routing/Packages.gz
*** Failed to download the package list from https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/routing/Packages.gz
Downloading https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/telephony/Packages.gz
*** Failed to download the package list from https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/telephony/Packages.gz
Collected errors:
* opkg_download: Failed to download https://downloads.openwrt.org/releases/23.05.0/targets/mediatek/mt7622/packages/Packages.gz, wget returned 1.
* opkg_download: Failed to download https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/base/Packages.gz, wget returned 1.
* opkg_download: Failed to download https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/luci/Packages.gz, wget returned 1.
* opkg_download: Failed to download https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/packages/Packages.gz, wget returned 1.
* opkg_download: Failed to download https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/routing/Packages.gz, wget returned 1.
* opkg_download: Failed to download https://downloads.openwrt.org/releases/23.05.0/packages/aarch64_cortex-a53/telephony/Packages.gz, wget returned 1.
If I open the link to the package list in my browser, it downloads to my computer with no problem.