Setting Secure boot issues

I have an Asrock H470 Phantom Gaming 4 Motherboard, and when I set secure boot, it either reboots to UEFI or tries to go on the internet. If during Startup I use the F11 key to go choose what disk to go to, it shows nothing is available to boot from.
I run Linux Mint as My daily Operating System, it sits on the M2 Drive, and also on that M2 Drive I have Manjaro installed.   On an SSD in my computer, I have Windows 10 Pro. The Only reason I have Manjaro installed is that It has the best Grub startup I have found, this Grub allows you to restart to the same OS, no matter which OS you have chosen to go to in the startup procedure, with No intervention from the user during that startup.

So my question is, How do I set up Secure Boot so it goes to the M2 drive when the computer cannot even detect it?

When I set it to Secure boot, and I have done this a few times over the past weeks, it sets the place to 1) the internet, 2)just circle back to UEFI. Every time before the secure drive is set, I have set it to go to the M2 drive, and it never does when set to Secure boot

I shot a video of what happens when I set up Secure boot on this desktop Computer- https://youtu.be/YNHAhnoqTQ4

When you create a USB stick for Windwos 10 or 11 using the media creation tool, you can install it in 2 modes
1. MBR mode
2. GPT mode, also called UEFI mode
When you set CSM to disabled (your graphics card should support GOP (Graphics Output Protocol), and you install windows, it is installed in GPT mode
When CSM is enabled, you have a choice
In the bootmenu (f11)you will see the USB device twice in the list, for example using a Kingston HyperXUSB stick with Windows instalaltion files
It will find USB Kingston Hyperx to boot from
And it will find a UEFI kingston hyperX to boot from
When you select USB Kingston HyperX, Windows will be installed in MBR mode
When however you select UEFI Kingston hyperX, Windows will be installed in GPT (UEFI) mode

Windows 11 ugrade demands, that Windows 10 is installed in GPT mode.
If this is not the case, you can use a microsoft tool like mbr2gpt to convert MBR into GPT, but it's not always working.
For Windows 11 you need the following BIOS settings
1. CSM disabled
Under Security Intel Platform Trust technology must be set to enabled
Under Advanced>> Trusted Computing, Enable security Device Support, then save with f10.
Now Secure boot should work

does your PC boots when CSM is disabled?
you will need bootable UEFI mode operating system on GPT drive (efi partition with efi boot loader(s))
if it doesnt boot with CSM disabled, then easiest way to make it working would be wiping your drive and installing linux/windows when CSM is disabled, that will install it in UEFI mode


btw windows 11 does not need secure boot to be enabled, it just needs uefi mode (csm disabled + intel platform thrust technology enabled)

anyway for secure boot, change user mode to custom/user, then clear secure boot keys and install default platform keys, this should be enough to make secure boot working