won't the packages still be maintained in arch repos? although it isn't supported by garuda explicitly anymore but that shouldn't mean it can't use garuda-update anymore. both the chaotic aur and arch repos are still open to you even if you don't use garuda at all so I don't see the issue here.
I trying your solution but what should I do for following ?
Replace atk with extra/at-spi2-core? [Y/n]
Replace crda with core/wireless-regdb? [Y/n]
Replace nerd-fonts-fantasque-sans-mono with extra/ttf-fantasque-nerd? [Y/n]
garuda-common-settings and ipw2100-fw are in conflict. Remove ipw2100-fw? [y/N]
garuda-common-settings and ipw2200-fw are in conflict. Remove ipw2200-fw? [y/N]
wireplumber and pipewire-media-session are in conflict. Remove pipewire-media-session? [y/N]
Total Download Size: 1744.32 MiB
Total Installed Size: 6941.89 MiB
Net Upgrade Size: 1312.80 MiB
:: Proceed with installation? [Y/n] y
:: Retrieving packages...
linux-zen-6.3.5.zen1-1-x86_64.pkg.tar.zst failed to download
linux-firmware-20230404.2e92a49f-1-any.pkg.tar.zst failed to download
firedragon-112.0.2-1-x86_64 76.9 MiB 3.92 MiB/s 00:20 [----------------------------------------------] 100%
garuda-wallpapers-r85.f5daed8-1-any 63.2 MiB 2.37 MiB/s 00:27 [----------------------------------------------] 100%
tela-circle-icon-theme-git-2023.04.16.r19.g49ae... 81.9 MiB 2.95 MiB/s 00:28 [----------------------------------------------] 100%
Total ( 5/1089) 1744.3 MiB 29.7 MiB/s 00:59 [----------------------------------------------] 100%
error: failed retrieving file 'linux-zen-6.3.5.zen1-1-x86_64.pkg.tar.zst' from mirrors.kernel.org : Failed to connect to mirrors.kernel.org port 80 after 5203 ms: Connection timed out
error: failed retrieving file 'linux-firmware-20230404.2e92a49f-1-any.pkg.tar.zst' from mirrors.kernel.org : Failed to connect to mirrors.kernel.org port 80 after 5202 ms: Connection timed out
error: failed retrieving file 'firedragon-112.0.2-1-x86_64.pkg.tar.zst' from cdn-mirror.chaotic.cx : Failed to connect to cdn-mirror.chaotic.cx port 443 after 9065 ms: Connection timed out
error: failed retrieving file 'garuda-wallpapers-r85.f5daed8-1-any.pkg.tar.zst' from cdn-mirror.chaotic.cx : Failed to connect to cdn-mirror.chaotic.cx port 443 after 9834 ms: Connection timed out
error: failed retrieving file 'tela-circle-icon-theme-git-2023.04.16.r19.g49aebe1c-1-any.pkg.tar.zst' from cdn-mirror.chaotic.cx : Connection timeout after 10000 ms
warning: too many errors from cdn-mirror.chaotic.cx, skipping for the remainder of this transaction
error: failed retrieving file 'linux-zen-6.3.5.zen1-1-x86_64.pkg.tar.zst' from mirror.rackspace.com : Connection timeout after 10000 ms
error: failed retrieving file 'linux-firmware-20230404.2e92a49f-1-any.pkg.tar.zst' from mirror.rackspace.com : Connection timeout after 10000 ms
error: failed retrieving file 'garuda-wallpapers-r85.f5daed8-1-any.pkg.tar.zst' from geo-mirror.chaotic.cx : Failed to connect to geo-mirror.chaotic.cx port 443 after 9062 ms: Connection timed out
error: failed retrieving file 'firedragon-112.0.2-1-x86_64.pkg.tar.zst' from geo-mirror.chaotic.cx : Connection timeout after 10000 ms
error: failed retrieving file 'tela-circle-icon-theme-git-2023.04.16.r19.g49aebe1c-1-any.pkg.tar.zst' from geo-mirror.chaotic.cx : Connection timeout after 10001 ms
warning: too many errors from geo-mirror.chaotic.cx, skipping for the remainder of this transaction
error: failed retrieving file 'linux-zen-6.3.5.zen1-1-x86_64.pkg.tar.zst' from mirror.rackspace.com : Connection timeout after 10000 ms
warning: too many errors from mirror.rackspace.com, skipping for the remainder of this transaction
error: failed retrieving file 'linux-firmware-20230404.2e92a49f-1-any.pkg.tar.zst' from mirror.rackspace.com : Connection timeout after 10000 ms
error: failed retrieving file 'garuda-wallpapers-r85.f5daed8-1-any.pkg.tar.zst' from au-mirror.chaotic.cx : Failed to connect to au-mirror.chaotic.cx port 443 after 9064 ms: Connection timed out
error: failed retrieving file 'firedragon-112.0.2-1-x86_64.pkg.tar.zst' from au-mirror.chaotic.cx : Failed to connect to au-mirror.chaotic.cx port 443 after 9833 ms: Connection timed out
error: failed retrieving file 'tela-circle-icon-theme-git-2023.04.16.r19.g49aebe1c-1-any.pkg.tar.zst' from au-mirror.chaotic.cx : Connection timeout after 10001 ms
warning: too many errors from au-mirror.chaotic.cx, skipping for the remainder of this transaction
warning: failed to retrieve some files
error: failed to commit transaction (unexpected error)
Errors occurred, no packages were upgraded.
Strange. Too many connectivity errors.
Do you have a good connection in general?
You could try later.
The pacman.conf should be ok now, so you could try a normal garuda-update
If not working, with the same or similar errors, you could try removing some of the used mirrors: Edit /etc/pacman.d/chaotic-mirrorlist and put a comment (#) before
au-mirror.chaotic.cx
cdn-mirror.chaotic.cx
geo-mirror.chaotic.cx