re How to change HP boot logo on Ubuntu 20.04?

Each time I power on my HP Probook 440 G2, it will show a customize photo before booting into Ubuntu - at that time, it would be prompted in the bottom left corner of the screen: "Press ESC for Setup Menu"

I found that it could be changed on Windows, and changing it related to BIOS multiplication - https://support.hp.com/us-en/document/c01646879.

And it was said somewhere, on Linux, it involves "EFI" folder, but my "EFI" folder was empty.

Is anyone here know how to do this?

These were the output of "sudo blkid": /dev/sdb5: UUID="4076ff65-4166-480b-9d65-27642c523b78" TYPE="ext4" PARTUUID="96f2f010-05" /dev/loop0: TYPE="squashfs" /dev/loop1: TYPE="squashfs" /dev/loop2: TYPE="squashfs" /dev/loop3: TYPE="squashfs" /dev/loop4: TYPE="squashfs" /dev/loop5: TYPE="squashfs" /dev/loop6: TYPE="squashfs" /dev/loop7: TYPE="squashfs" /dev/sda1: LABEL="Products" UUID="9e148580-9ad0-4070-9364-3e37f3254c4e" TYPE="ext4" PARTUUID="9e62b9bd-01" /dev/sda2: LABEL="Projects" UUID="27124deb-e165-4b7f-847e-0a2dfbd268ea" TYPE="ext4" PARTUUID="9e62b9bd-02" /dev/sda3: LABEL="Goods" UUID="13f2ed7d-fc42-4e41-ac28-be6605fb21f5" TYPE="ext4" PARTUUID="9e62b9bd-03" /dev/sda4: LABEL="Archives" UUID="3dbd2523-74c0-49de-8bd6-e248d089cbea" TYPE="ext4" PARTUUID="9e62b9bd-04" /dev/sdb1: UUID="6671-F0DE" TYPE="vfat" PARTUUID="96f2f010-01" /dev/sdb2: UUID="F976-5B53" TYPE="vfat" PARTUUID="96f2f010-02" /dev/loop8: TYPE="squashfs" /dev/loop9: TYPE="squashfs" /dev/loop10: TYPE="squashfs" /dev/loop11: TYPE="squashfs" /dev/loop12: TYPE="squashfs" /dev/loop13: TYPE="squashfs" /dev/loop14: TYPE="squashfs"