The operation usually can be done by entering in Service_Mode (Jumper), dumping bios region, mod and flashed back with Intel FPT tool.
It is advisable to mod only the bios_region but several backup dumps should be made for safekeep machine original data, before any further flash operations.
A resumed Dell machine guide here and an overview of this system troubleshooting here on this thread from several users issues (Read all the thread for full understanding, if never used this tool).
Good luck
EDIT: The insertion of the NVMe DXE driver seems correct in the vol6 of the dump.
EDIT: Glad you succeed, all the best.