@Tiddlybob : the solution for Streams compatibility with TheBrain here works pretty well for me with TiddlyMap also. I think it solves half of it. I think a bit more would be needed but feel free to give it a spin.
After you add the two functions getStreamLinks() and getStreamBacklinks(), you can search and replace the legacy getLinks() and getBacklinks() wherever you see them in the TiddlyMap plugin tiddlers.