For example, !android recently merged into !android, where lemdro.id is the canonical server.
Off-topic and what follows doesn’t mean your CNAME idea is bad, but it’s important to highlight that this example is wrong because the “merger” was forced because current mods were victims of imposter syndrome and felt obligated to gift the community to Reddit mods on another instance and denied us 19k members a say in this, and we are right now requesting to cancel it because it was a one person move. See more context in my comment here: lemmy.world/comment/980033 . In short, there is no “merger”, it is a rogue mod move and if you liked !android and never asked to move, I recommend you stay because I believe we can absolutely defeat this hostage-taking and reopen the community.