Yes, this is “surface level” styling as a theme. It targets Inkscape-specific widgets as much as possible, which improves things considerably. It does not change Inkscape beyond the styling level
If you could explain your panel issue in more detail (I don’t understand what you meant exactly) and if there isn’t already, it would be good to submit it as a issue to Inkscape directly
nope, since fedora 38 this button enables full access to flathub. it also lets you install proprietary nvidia drivers from gnome-software with one click. hardware decoding via ffmpeg also works for flathub apps that require it.
Yes, this is “surface level” styling as a theme. It targets Inkscape-specific widgets as much as possible, which improves things considerably. It does not change Inkscape beyond the styling level
If you could explain your panel issue in more detail (I don’t understand what you meant exactly) and if there isn’t already, it would be good to submit it as a issue to Inkscape directly