First thing, you've used the v4 guide, and the b2200 is stuck on v3:
If you were using Openwrt and not stock GL firmware then you should have used the gl-b2200-squashfs-emmc.img from Index of /releases/24.10.1/targets/ipq40xx/generic/
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=febc2b831f633d8d6648267952bd43c35689c36f