I noticed here two things about firmware:
1. apt list linux-firmware
https://launchpad.net/ubuntu/+source/linux-firmware
$ apt list linux-firmware -a
Listing... Done
linux-firmware/focal-updates,focal-updates 1.187.17 all [upgradable from: 1.187.16]
linux-firmware/now 1.187.16 all [installed,upgradable to: 1.187.17]
linux-firmware/focal,focal 1.187 all
2. fwupdmgr
https://wiki.archlinux.org/title/Fwupd
https://github.com/fwupd/fwupd
https://fwupd.org/lvfs/docs/users
$ fwupdmgr get-updates
Devices with no available firmware updates:
• KIOXIA-EXCERIA PLUS SSD
• UEFI Device Firmware
• UEFI Device Firmware
• UEFI dbx
Devices with the latest available firmware version:
• Thunderbolt host controller
• Embedded Controller
• Prometheus
• System Firmware
• UEFI Device Firmware
No updates available for remaining devices
$ fwupdmgr get-releases
Choose a device:
0. Cancel
1. 0dc2af238bee6aba3964d974a6ca6e967f3d78fb (Thunderbolt host controller)
2. d4db94d2324ae6986698e7489b234c0377fd8465 (Embedded Controller)
3. d432baa2162a32c1554ef24bd8281953b9d07c11 (Prometheus)
4. 09647b198775f1868cc695ec2685477e0964c323 (System Firmware)
5. 317fd9ef3f069f67047ab1163f8c040c3853cc38 (UEFI Device Firmware)
Are they doing (install/update firmware) the same thing (from different update source) ?