Yes, that is actually a nice idea. Or keep the formatting as is (with magazine avatar and name) but add an icon for external magazines. Or maybe add the "(kbin.somethingelse)" text over there so it is extra clear that the originating instance is not the one you are currently using.

And besides that there are maybe ways to see the same information (albeit in a cumbersome way), ideas to make kbin/the fediverse better and more user friendly is always good. Getting into the fediverse is weird already (the whole concept is not really something people are used too, besides perhaps email), so better make all the rest a breeze.