Yes, but OP makes it sound like the Hollow Knight issue is not fixed either. I didn't even know HK had rumble, but I def felt the Silksong haptics when I played it at Gamescom. I wonder how we can make Team Cherry aware of this, or whether they are already aware?
I work at a game studio that provides Linux-native builds of our game. I don't speak for them but in my opinion this gives us an opportunity to take advantage of Linux features such as better input systems, performance, dev tooling, and in the future maybe APIs like Wayland. While the Windows build does work via Proton, it's limited to what Microsoft allows us to do with the Windows API. We also have to use a non-standard-compliant compiler (msvc) and overall maintaining a Windows build damages code quality, performance, dev speed, and end user experience. Our Linux userbase is already small enough, imagine if all our players started using the Proton version. It'd become impossible to justify spending as much time on the Linux builds as we do, and they would probably stop being available. So, although I see WINE and Proton as a net positive, I fear it will slowly kill Linux development and eventually all games will be limited 100% by what MS decides, despite technically playing them on a free platform.