AMI is a company, Aptio its their core bios product and if it opens with AMBCP then its Aptio IV or V bios based, IV is yours.
AFUWIN and Asus security basis prevents modified bios from being flashed into a system.
You can use extracted files in it, as you saw the tool reports it as theres no Asus header / EC.
The best way is to extract the bios region with UEFI tool or dumping with Intel FPT tool, mod it and flash it back with Intel FPT tool, for this its needs SPI bios unlocked or any of the methods described in this guide.
EDIT: Who told you that its locked? Thats not my exact words are they? To use the tool it needs to be unlocked thats what i wrote.
If you have no ideia… stay with your CH341… you asked for an alternative.
Unlocking, to read and learn.
Theres other methods for unlocking the SPI, search on the forum for RU tool / Asus unlock
etc…