Thank you for your asking. First of all, I edited your passage and deleted your SN info. Please be aware that sharing the personal information like SN or IMEI on the Internet is quite dangerous.
Second, please refer to the website. I can only find Version WW-22.214.171.1248 for CPU=2.34GHz.https://www.asus.com/supportonly/ASUS%20ZenFone%203%20Deluxe%20(ZS570KL)/HelpDesk_BIOS/
Although I can not find other firmware versions for for CPU=2.34GHz on the website, you may try Version WW-126.96.36.1998(For 2.4GHz CPU) with manual update. Yet if there is no pop-up notification after reboot, then the firmware is not compatible to your CPU.
#Update Guide (download the file into the root directory, aka the outermost place, of the internal storage>reboot>tap the "system update" notification) https://www.asus.com/support/FAQ/1009748/
Furthermore, WW/JP/CN/RU is a big scale of the firmware category based on SKUs or countries, yet some models have their own rule for firmware version due to the device design. For the next time, please check on our official website support page of your model for confirming more information.