Importantly, the universe being a simulation does not imply solopsism.
I have seen a few cases of solopsism and similar philosophies taken as a given, based on the ‘universe is a simulation’ press circulating. Eventually news will spread that theoretical physicists think of mind as a substrate of reality. What philosophies will people be drawn to while digesting that revelation?
It is important to remember that in any of these metaphysical views, it can still be true (and perhaps much more-so) that we are all in it together.
Perhaps I am just an ant, or just dust, or just digital. And so, I know how much an ant, or dust, or digital bits, can suffer, aspire, inspire, and love.
May peace be upon you!