I am not sure if it helps but there are 2 parts of log from 2 different RPi 4B boards:
Board 1 - RPi 4B / 2GB, bootloader upgrade unsuccessful (run on nightly-20211127-e3a7c06):
LE:/tmp # rpi-eeprom-update -f /tmp/pieeprom
*** INSTALLING /tmp/pieeprom ***
CURRENT: Tue Jul 6 10:44:53 UTC 2021 (1625568293)
UPDATE: Mon Nov 22 11:23:32 UTC 2021 (1637580212)
BOOTFS: /flash
EEPROM updates pending. Please reboot to apply the update.
To cancel a pending update run "sudo rpi-eeprom-update -r".
LE:/tmp # reboot
Board 1 - RPi 4B / 4GB, bootloader upgrade successful (run on nightly-20211124-7ef3241):
LibreELEC:/tmp # rpi-eeprom-update -d -f /tmp/pieeprom
*** INSTALLING /tmp/pieeprom ***
CURRENT: Tue Jul 6 10:44:53 UTC 2021 (1625568293)
UPDATE: Mon Nov 22 11:23:32 UTC 2021 (1637580212)
BOOTFS: /tmp/tmp.ibhge2
EEPROM updates pending. Please reboot to apply the update.
To cancel a pending update run "sudo rpi-eeprom-update -r".
LibreELEC:/tmp #