Comment by jchw

Former Dendrite user: Yes and no. Mautrix stuff does work with Dendrite, technically, but only partially. For Mautrix-Discord, I was able to get DMs mostly working, but only DMs: bridging servers just never really worked at all. I'm honestly not 100% sure why this is the case, but it's not worth worrying about Dendrite anymore. It is a dead-end server that never worked very well. Up until shortly before it was discontinued, none of the Mautrix bridges worked well enough to actually use.