I understand that nvidia support for wayland is lacking, but I know it's possible.
For context, I was using sway 1.8 for a while (no official support for nvidia). It was working almost perfectly, only minor issues. After the update to 1.9, I get constant flickering.
I can downgrade to 1.8, but the fact that 1.8 was working tells me that it is possible for a window manager to work well for nvidia. The problem is the sway team does not want that headache (understandably so).
Are there any alternatives that work well with nvidia?
Until its drivers are completely open source, Nvidia will continue to cause trouble every once in a while.
Therefore, if you liked Sway, then don't leave it expecting to be a lot better elsewhere.
However, Hyprland's community is pretty big and I can only be positive regarding the pace of its development. Therefore, if anything, Hyprland might be able to offer a solution. But, don't forget what I said earlier*.