BIOS menu not displaying, along with GRUB and Ventoy

[ariher]

In short, GRUB2 stopped displaying a few days ago, along with the BIOS menu and a Ventoy flash drive I own.
All of these previously mentioned systems work, since I can still boot both my main system and Ventoy, and when inside the BIOS menu, I hear a beep when I press a key I'm not intended to press.
I have attempted:
- Timeshifted back to when this issue was absent.
- Gone into the BIOS menu with and without the HDMI connected.
- Changed GRUB2 via "xed admin:///etc/default/grub" to change the line 'GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"' to... some other line, I cant find the page but this attempt also did not work.
- Taking the motherboard's battery off to reset the CMOS.
- Pressing the "Fn+switch displays" while on the BIOS menu.
I believe there's one more thing, but I cant remember what else I tried.

I believe the problem started after booting on kali-linux-live from my ventoy drive and updating/upgrading it, but I cannot tell for sure, I don't remember the moment the problem started.

HARDWARE:
I am using an HP OMEN ax-100la with 16GB of ram both of 2133MHz, BIOS updated when upgraded from 8 to 16, as per the manual. I have an extra M.2 of 512GB of memory which has Linux Mint and Windows 10 installed, along with an old hard drive of 1TB (came with the computer).

SOFTWARE:
My main system is Linux Mint Mate 21.1, along with Windows 10, both installed on the M.2 as stated before, as such, GRUB2 aids me on choosing the OS I want to boot to.

I doubt this issue has anything to do with software, but I can give more details if necessary.