Is uboot updated when flashing the newest stable firmware?

[alzhao]

The uboot version is displayed on uboot itself.

So when you enter uboot failsafe mode, the version will be displayed there.

Check out this post about Flint uboot

GL-iNet AX1800 OpenWrt firmware

openwrt-ipq60xx-generic-glinet_gl-ax1800-squashfs-nand-factory.bin is ubi format itself, upgrade it by uboot, at page http://192.168.1.1/. you may need to upgrade uboot firstly, and this version is newer than your previous google drive file. upgrade uboot at page http://192.168.1.1/uboot.html.