Qubes detached header installation boot entry missing can't add

Boot entry missing was a comman problem whenever my system restarts unexpectedly.
I used to have a pendrive with qubes bootable then whenever entry was missing I used to boot into installation drive enter efibootmgr command and then re-start and enter into my os.

Last night something happened I don’t know what. Even after entering the efibootmgr command the boot entry dissapears after reboot.

Kindly help me to recover the data atleast. My last backup was on November.

Detached header Qubes boot entry missing.
Even after adding “efibootmgr -v -c -u -L /EFI/qubes/grubx64.efi -d /dev/sde -p 1”
When i enter this command qubes boot entry creates but dissapears after reboot.
Please help

Update :
I tried this command
cryptsetup open luks /dev/nvme0n1 --header /dev/sde2
It got open but can’t Mount
Says bad fs type.