finally vivaldi is fixed, had to delete the desktop item in .local/share/application and let it be repopuated

overlays/vivaldi/default.nix

@@ -1,5 +1,14 @@
 { channels, ... }:
 
 final: prev: {
-  vivaldi = prev.vivaldi.override { commandLineArgs = "--disable-features=AllowQt"; };
+  vivaldi = prev.vivaldi.overrideAttrs (oldAttrs: {
+    dontWrapQtApps = false;
+    nativeBuildInputs = oldAttrs.nativeBuildInputs ++ [ channels.unstable.kdePackages.wrapQtAppsHook ];
+    commandLineArgs = ''
+      -enable-features=UseOzonePlatform
+      --ozone-platform=wayland
+      --ozone-platform-hint=auto
+      --enable-features=WaylandWindowDecorations 
+    '';
+  });
 }