https://bugs.winehq.org/show_bug.cgi?id=48068
--- Comment #15 from Patrick McMunn doctorwhoguy@gmail.com --- OK. I actually did find something that worked for me. Open up winecfg and go to the "Libraries" tab. If they do not already exist, add entries for d3d11 and dxgi then set them both to "builtin". Probably due to something I'd previously installed with Winetricks, both of these entries were already present on my system and set to "native". Please be aware that I am using dxvk, so I don't know if this will work if you aren't using dxvk.
After making these changes, Epic Games Launcher starts up with no graphical anomalies. If started from the console, you'll see "01e8:fixme:dxgi:d3d11_swapchain_Present1 Ignored present parameters 0000000000B9E0A0." spammed to the console along with a few other error messages. However, it seems to work fine. Ionly tested two games. Fall Guys installed but failed to start, but DARQ installed and ran flawlessly.