The bridge for revolt/stoat has been around for some time now. You might still need to search for matrix-protocol-revolt (or something like that) rather than stoat; as the name change is fairly recent, and may not have been implemented by the team responsible for matrix.

That being said, native federation support is always better. The bridge will require you to run a matrix backend like synapse alongside stoat chat, (so two different chat services rather than just one running) at which point you might as well just look at a discord designed frontend for matrix instead.