I'm not sure what you consider "higher-end", but the list of supported devices is pretty long: https://fwupd.org/lvfs/devices/#lenovo_thinkpad https://fwupd.org

I'm not sure what you consider "higher-end", but the list of supported devices is pretty long: https://fwupd.org/lvfs/devices/#lenovo_thinkpad https://fwupd.org/lvfs/devices/#lenovo_thinkpad