no title bar for vulkan window

ubuntu 22.04
Qt 6.5.1 online install
official example

Desktop_Qt_6_5_1_GCC_64bit-Debug/vulkantextureimportapp -qmljsdebugger=port:38119,block,services:DebugMessages,QmlDebugger,V8Debugger,QmlInspector,DebugTranslation ...
QML debugging is enabled. Only use this in a safe environment.
qt.scenegraph.general: threaded render loop
qt.scenegraph.general: Using sg animation driver
qt.scenegraph.general: Animation Driver: using vsync: 16.68 ms
QML Debugger: Waiting for connection on port 38119...
qt.scenegraph.general: Using sg animation driver
qt.scenegraph.general: Animation Driver: using vsync: 16.68 ms
qt.scenegraph.general: Creating QRhi with backend Vulkan for window 0x7fffffffe220 (wflags 0x1)
  Graphics API debug/validation layers: 0
  Debug markers: 0
  Prefer software device: 0
  Shader/pipeline cache collection: 1
qt.scenegraph.general: Got Vulkan instance from QVulkanDefaultInstance, requested api version was QVersionNumber(1.3)
qt.rhi.general: Initializing QRhi Vulkan backend 0x7fff8c081b80 with flags 8
qt.rhi.general: Enabled instance extensions:
qt.rhi.general:   VK_KHR_get_physical_device_properties2
qt.rhi.general:   VK_KHR_surface
qt.rhi.general:   VK_EXT_debug_utils
qt.rhi.general:   VK_KHR_wayland_surface
qt.rhi.general: Physical device 0: 'Intel(R) UHD Graphics 770 (ADL-S GT1)' 22.2.5 (api 1.3.224 vendor 0x8086 device 0x4690 type 1)
qt.rhi.general:     using this physical device
qt.rhi.general: Physical device 1: 'llvmpipe (LLVM 15.0.7, 256 bits)' 0.0.1 (api 1.3.224 vendor 0x10005 device 0x0 type 4)
qt.rhi.general: queue family 0: flags=0x7 count=1
qt.rhi.general: 123 device extensions available
qt.rhi.general: Enabling device extensions:
qt.rhi.general:   VK_KHR_swapchain
qt.rhi.general:   VK_EXT_vertex_attribute_divisor
qt.rhi.general: Using queue family index 0 and queue index 0
qt.scenegraph.general: Created QRhi 0x7fff8c07e6e0 for window 0x7fffffffe220
qt.scenegraph.general: MSAA sample count for the swapchain is 1. Alpha channel requested = no.
qt.scenegraph.general: rhi texture atlas dimensions: 512x512
qt.rhi.general: Creating new swapchain of 4 buffers, size 400x400, presentation mode 2
11:12:35: Debugging of /media/ldata/develop/Qt/Examples/Qt-6.5.1/quick/scenegraph/build-vulkantextureimport-Desktop_Qt_6_5_1_GCC_64bit-Debug/vulkantextureimportapp -qmljsdebugger=port:38119,block,services:DebugMessages,QmlDebugger,V8Debugger,QmlInspector,DebugTranslation has finished.