“UEFI-Rebooter is a bash script for implementing dual boot through uefi.” It is labelled “Windows Boot Manager”, and calls Linux’s efibootmgr as it’s main tool.
https://github.com/Dertosh/UEFI-Rebooter
https://github.com/Dertosh/UEFI-Rebooter/blob/master/UEFI-rebooter.sh