$ yay
:: パッケージデータベースの同期中...
:: システム全体の更新を開始...
警告: filesystem: パッケージの更新を無視 (2023.09.22-1 => 2023.12.21-1)
警告: plymouth: パッケージの更新を無視 (22.02.122-15 => 24.004.60-1)
何も行うことがありません
:: AUR からアップデートを検索...
:: データベースからアップデートを検索...
-> filesystem: ignoring package upgrade (2023.09.22-1 => 2023.12.21-1)
-> plymouth: ignoring package upgrade (22.02.122-15 => 24.004.60-1)
-> Packages not in AUR: linux6.5.9.zen2-1-zen-bin linux6.5.9.zen2-1-zen-headers-bin
-> Orphan (unmaintained) AUR Packages: wcp-git
there is nothing to do


とりあえずfilesystem plymouth は止めとくか

WARNING: The plymouth-encrypt and sd-plymouth hooks no longer exist in the package. You should replace them with encrypt and plymouth hooks in your mkinitcpio.conf.
The lxdm-plymouth.service, lightdm-plymouth.service and sddm-plymouth.service systemd service files no longer exist in the package. You should enable lxdm.service, lightdm.service or sddm.service instead.