in qfil under the tools menu theres partition manager. if it lists the partitions there you can then choose to make backups or flash the individual partitions.but make sure you know which is which when flashing.I did it, no results. I have flashed step by step, for example ( RawProgram0.xml and Patch0.xml ) I doubt whether the combination of files are correct or not ( but I have also tried ( RawProgram0.xml and Patch1.xml ) and nothing works.
id start with boot,vbmeta,dtbo.....
just to try and get fastboot working and then proceed from there.