Caution: QWT 4.1.70-1 is only a dummy! The last usable version is 4.1.69-1, which works on both Qubes R4.2.4 and R4.3 but does not provide seamless mode. See the discussion about QSB-091, especially in Qubes OS and Windows 11 Pro as a functional qube under 4.2 possible?.
If you are courageous, you might also try the field test version of QWT 4.2.0, which runs under Windows 10 and 11 but still has some problems with its graphics driver.