Keep a copy of SP Flash Tool 6.2216 in your repair toolkit, but treat it as a specialized tool for a specific generation of MTK hardware, not a universal solution.
However, for the latest Dimensity 6000/7000/8000 series or any device with a "secure DA" signature check, you’ll need to move to v6.2404+ or switch to (open-source, Python-based) which uses a different BROM exploit.