I'm not sure I understand this phrase. Is it installed but without following the exact steps (like adhoc?), or what?
If custom bootloader was not installed, then please proceed with this:
it helps in 99% situations like this, but you should have stock bootloader.
Once stock fiware is restored, proceed with installation OpenWrt again.
After OpenWrt is installed, please do not forget to execute this command that updates /etc/rc.local and keeps stock flag within threshold limit: https://openwrt.org/inbox/toh/xiaomi/ax3000t#basic_configuration