Historical Context
Win4Lin Kernel Patches
Kernel patching was part of the older technical era of Linux-hosted Windows compatibility. That is no longer the normal path for mainstream users.
Why patching used to matter
Earlier compatibility strategies leaned closer to the host kernel and distribution packaging details. Modern users usually solve the same problem at the application, browser, Proton, or VM layer instead.
Modern alternatives
Native Linux clients, PWAs, Wine, and mainstream virtualization stacks all removed the need for end users to chase custom kernel patches just to keep working.