We set up a bridge between the Lemmy.world General Matrix room and the Public-1 channel on the Lemmy World discord server yesterday. It’s not perfect as emoji reactions aren’t visible and some minor things like how it handles edited messages but other than that it seems to be working well.
Now people on both chat clients can interact with eachother!
I would also recommend fluffy chat to people because in addition to that it’s also one of the only ones to support multiple accounts, an important feature for element because simply switching back and forth between accounts isn’t feasible on a service with end-to-end encryption where you have to maintain a single login else lose your keys and prior encrypted messaging history.