Grub has no input and won't boot

[fc26wuqa]

Hello,

I switched my boot partition, changed its label from "legacy_boot" to  
"bios_grub" (grub-install wouldnt work otherwise).

I have a btrfs root, and my boot partition is ext4 (I don't know why  
someone did that, I just inherited it. But it worked in the past.)

I did a grub-install /dev/nvme0n1 and a grub-mkconfig -o  
/boot/grub/grub.cfg and added the parition to my fstab to mount as  
/boot.

Now when I boot, it only shows "GRUB _" (with a blinking cursor after  
it), and I cannot input anything.
I have a supermicro server and I am accessing the server on its remote  
console.

Can anyone help me debug this? (Supermicro remote console is also  
kinda shitty, tbh)

Best,
Lucienne