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.
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!