Oops, you're correct. Looking through my shell history, it seems I manually downloaded and installed the firmware update in March of 2022. Here are the commands I ran:

    curl -O https://semiconductor.samsung.com/resources/software-resources/Samsung_SSD_980_PRO_5B2QGXA7.iso
    mkdir /mnt/iso
    sudo mount -v -o loop ./Samsung_SSD_980_PRO_5B2QGXA7.iso /mnt/iso/
    mkdir /tmp/fwupdate
    cd /tmp/fwupdate
    gzip -dc /mnt/iso/initrd | cpio -idv --no-absolute-filenames
    cd root/fumagician/
    sudo ./fumagician