I don't see anyway around XWayland. You could run X in a separate VT but that wouldn't be "in" Wayland and while you wouldn't need to login, you'd still need to spawn it.
You could try running RPCS3 in gamescope as a workaround, but it's probably Nvidia + Wayland that's the issue.
EDIT: Have you tried running RPCS3 with both Wayland and XWayland? RPCS3 supports native Wayland as well so if it's an XWayland only issue then that should fix it. Conversely if native Wayland is actually what is breaking it you could try:
QT_QPA_PLATFORM=xcb rpcs3
which would force XWayland. Presumably it's QT_QPA_PLATFORM=wayland
for wayland support, although it's the default on my system.
I suspect they are trying to have it both ways so to speak. Call out Biden and how it's a "witch hunt", and quietly increase support without criticising Trump directly. Because if they do attack Trump, they know his supporters in the primaries will turn on them.