Boot2Qt Waveshare Display is not Working

[Jacob Chafin]

Issue: When I boot up the Raspberry Pi with dtoverlay=vc4-fkms-v3d the screen has white lines and it's blurry beyond comprehension. When I set dtoverlay=vc4-kms-v3d the raspberry pi works perfectly fine but doesn't load the Qt Demo application. I know the display works and display correctly with the manufactures defaults without using Boot2Qt and running Raspbian OS, but it seems something is wrong with Boot2Qt and my display working together.

Hardware:
Raspberry Pi 4 Model B
Waveshare 7inch HDMI LCD (C) https://www.waveshare.com/wiki/7inch_HDMI_LCD_(C)
My config file with the manufactures defaults at the end => https://pastebin.com/Q7ThfpDs

Any help is much appreciated also if you could tell me how you came to answer so I can learn how to debug problems on my own I would be happy to learn. End goal is to make a car entertainment system for my Nissan Altima and a couple of friends and learn along the way! Thank you again and hope everyone's new year is going great.

[jsulm]

@Jacob-Chafin Just a hint: Boot2Qt is commercial, so I guess you have a commercial license? If so you can ask QtCompany directly for support.