: You cannot simply "convert" a v5 scatter text file to a v6 XML for older devices; the two versions are intended for different chipsets and protocols. If your firmware only has a .txt scatter file, you should use SP Flash Tool v5 instead.
: Modern MediaTek chipsets (like the G99 series) use advanced protocols (Protocol V6) that require tighter integration of authorization keys and secure boot protocols. Cross-Platform Compatibility : Users on sp flash tool v6 xml file