Stand alone Qt application with multiple windows not rendering on Wayland platform

I have cross compiled Qt application with multiple windows and running the same on IMX8(target board) using platform wayland-egl. The sub-window is used to render the 3D. I am not able to see the 3D on the sub-window. Instead I am seeing a blank black screen.

The application is configured for Desktop and is working perfectly fine. I also ran the application using weston compositor on platform wayland-egl which also works fine in Desktop.

The only difference we are observing between IMX8 and Desktop is weston compositor is trying to use drm_backend.so (in IMX8) and x11_backend.so (in Desktop).

In Desktop, if we launch weston with backend = drm_backend.so, we are observing error as below:

Date: 2021-08-13 IST
[18:18:25.569] weston 8.0.0
               https://wayland.freedesktop.org
               Bug reports to: https://gitlab.freedesktop.org/wayland/weston/issues/
               Build: 8.0.0
[18:18:25.569] Command line: weston --backend=drm-backend.so
[18:18:25.569] OS: Linux, 5.4.0-70-generic, #78-Ubuntu SMP Fri Mar 19 13:29:52 UTC 2021, x86_64
[18:18:25.569] Starting with no config file.
[18:18:25.569] Output repaint window is 7 ms maximum.
[18:18:25.593] Loading module '/usr/lib/x86_64-linux-gnu/libweston-8/drm-backend.so'
[18:18:25.627] initializing drm backend
[18:18:25.627] logind: not running in a systemd session
[18:18:25.627] logind: cannot setup systemd-logind helper (-61), using legacy fallback
[18:18:25.627] fatal: drm backend should be run using weston-launch binary, or your system should provide the logind D-Bus API.
[18:18:25.627] fatal: failed to create compositor backend
Internal warning: debug scope 'drm-backend' has not been destroyed.

1. Please help in fixing the above issue as I am new to this domain.
2. Why does multiple window Qt application not rendering as expected when using wayland platform?

Please let me know if any input is required. Thanks in advance!