SUMMARY

It would be great if Qt6 applications run under Plasma 5 would use the same look n' feel as Qt5 applications.

Several projects have started releasing qt6 versions of their software but they all look terrible under Plasma 5 as they don't look at all like their qt5 counterparts - presumably because the Plasma 5 themes simply do not support qt6.

Having this in, would likely get more people to start using the qt6 versions of various pieces of software which would be a great way to ensure that things are working well when plasma 6 lands.

STEPS TO REPRODUCE
1. launch a qt6 application (such as Strawberry)

OBSERVED RESULT
It doesn't follow the theme of the plasma environment / doesn't look like strawberry-qt5.

EXPECTED RESULT
Should look identical to the qt5 versions.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: NixOS unstable
KDE Plasma Version: 5.26.1
KDE Frameworks Version: 5.99
Qt Version: 5.15.6

ADDITIONAL INFORMATION
I understand why you may not want to spend resources on something that is only expected to be used for a short period of time, but assuming Plasma 5 will stick around for a while, it will give those users a nicer experience as more and more projects switch to qt6.