You can generate your own keys.
Here are two PDF links I copied just now from a post I made 2 years ago here. I don’t keep these white listed, so I did not check them for connecting. The first is the official UEFI overview. The second is a great guide from the US government detailing exactly how to set the keys. If that link doesn’t work, pull out the document number from the link and search for it. Gentoo and Arch have guides on this. Fedora has the most advanced pre Linux init system in my opinion.
If you have secure boot enabled, and you are using the shim from fedora or ubuntu, then yes you need to worry about it if you want to dual boot with w11.
You can generate your own keys. Here are two PDF links I copied just now from a post I made 2 years ago here. I don’t keep these white listed, so I did not check them for connecting. The first is the official UEFI overview. The second is a great guide from the US government detailing exactly how to set the keys. If that link doesn’t work, pull out the document number from the link and search for it. Gentoo and Arch have guides on this. Fedora has the most advanced pre Linux init system in my opinion.
https://uefi.org/sites/default/files/resources/UEFI_Secure_Boot_in_Modern_Computer_Security_Solutions_2019.pdf
https://media.defense.gov/2020/Sep/15/2002497594/-1/-1/0/CTR-UEFI-Secure-Boot-Customization-UOO168873-20.PDF
If you have secure boot enabled, and you are using the shim from fedora or ubuntu, then yes you need to worry about it if you want to dual boot with w11.