The same is true with an Adwaita theme for KDE/Qt Apps. I used to do this on both, Plasma and GNOME.
These days I style my Qt/KDE apps all Breeze on GNOME and vice versa when I am on KDE, because unfortunately icon sets just don’t match up and I've run into 'invisible buttons' issues way to often.
As long as both are in dark/light mode I find this way less annoying than having to hope for a good enough tooltip on mouse over (or just tap and see on mobile).
These days I style my Qt/KDE apps all Breeze on GNOME and vice versa when I am on KDE, because unfortunately icon sets just don’t match up and I've run into 'invisible buttons' issues way to often.
As long as both are in dark/light mode I find this way less annoying than having to hope for a good enough tooltip on mouse over (or just tap and see on mobile).