But it isn’t, there is a whole different mindset needed with Linux.
OK, so as a test, on your linux distro install, now install windows on that system using the defaults… does that work without using the custom install feature?
Can you point at the MS Windows documentation for this install to dual boot with Linux? Install openSUSE in WSL2 and have a play to see what it’s all about?
There is documentation for the Agama Installer I pointed this out in another post (which that user basically said they don’t want to read it…)
https://forums.opensuse.org/t/agama-installation-experience/191486/31