Update UEFI from Linux using fwupdmgr:
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1. Check for firmware updates with command:
fwupdmgr get-updates


2. Upgrade/installed UEFI with command:
sudo fwupdmgr install
*Make sure your EFI partition has enough space for the firmware!

3. Run this command again after the reboot to upload results to fwupd.org and set auto upload.
fwupdmgr get-updates


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Source (OG): https://access.redhat.com/solutions/5436071
Date (OG): October 31st 2022


Source (Update 1): https://fwupd.org/lvfs/
Date (Update 1): October 3rd 2023