Once I got kblocks installed with @Lin-Buo-Ren’s instructions, happy to only see one entry for it (with the icon!) in GNOME Shell’s application launcher!
I am also not getting any sound.
And the mouse cursor seems to be unstyled. I have a hi-dpi laptop, so I increase the cursor size, but in kblocks it’s tiny, and it doesn’t appear to follow the theme. I tried the Ubuntu-default yaru and the GNOME-default adwaita cursor themes. (FWIW I’ve noticed this with some other Qt snap apps, such as VLC, although others, such as KeePassXC and Picard have it working. Picard does use an older
kde-framework- snap IIRC.)