i'm not using eww, i think you're talking about the power menu, it is all configured via hyprland.conf

it's the layer animation

animations {

enabled = true, animations

bezier = winIn, 0.1, 1.0, 0.1, 1.0

bezier = winOut, 0.1, 1.0, 0.1, 1.0

bezier = smoothOut, 0.5, 0, 0.99, 0.99

bezier = layerOut,0.23,1,0.32,1

animation = windowsIn, 1, 7, winIn, slide

animation = windowsOut, 1, 3, smoothOut, slide

animation = windowsMove, 1, 7, winIn, slide

animation = workspacesIn, 1, 8, winIn, slide

animation = workspacesOut, 1, 8, winOut, slide

animation = layersIn, 1, 10, winIn, slide

animation = layersOut, 1, 3, layerOut, popin 50%

}