Hi,
Thank you for the suggestions and being aware of the problem.
I was able to resolve the problem by performing a hard reboot and changing the view mode in the display panel to “Resize remote display.” The key was to unplug the power cable completely; simply shutting down and restarting the computer wasn’t sufficient.
This solution agrees with the report mentioned here: https://forum.nomachine.com/topic/ubuntu-24-04-showing-squeezed-screen-on-remote-windows-11-client
I appreciate your assistance.