Force using Wayland

I use GNOME under Wayland. When I start Paraview {5.10.1, 5.11.0}, is says

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.

The variables are set correctly, but not taken into account. Using the xeyes app I notice, that Paraview indeed does not run natively under Wayland.

Unfortunately, the resolution under XWAYLAND0 is below my native HiDPI resolution, resulting in a very blurred UI.

I got all of my other applications (electron apps, browsers, ...) working correctly (and crisp) under Wayland, Paraview, however, is a tougher nut to crack.

Is there any possibility, to get a decent and crisp UI?

• Is it possible to enforce the usage of Wayland (is there something like a qt5 flag)?
• Would it be possible, to somehow influence the resolution of XWAYLAND0?

Thanks.