Is there a way to enable SGX from Endeavour OS?

Yes the CPU supports it. No info that shows any settings in the Bios on that particular board.

Edit: You have an older motherboard. I do see sgx modules package in the AUR but i have no experience or info about it. Not sure any of this would be of any benefit. :man_shrugging:

https://aur.archlinux.org/packages/linux-sgx-driver-dkms-git