I can confirm that this above methode also working in Vivo Y91, Y93, and Y95
dead boot during erase user data partition for clear user lock use QFIL,
which end up by wrong erase entire disk.
Because entire disk is format, so imei data partitions is also erased.
To recover imei and callibrations data, you can use official vivo split firmware,
and pick rawprogram_unparse.xml with dummy modemst and default fsg image.