Searching for users/rooms should ignore accents (i.e. users Araújo and Araujo should appear if i search "arau"), and this is not the behaviour I'm observing.
Does anyone know if there's an option somewhere I can enable to have this?
I would encourage you to visit the bug page linked above and click the Vote and Watch links near the top right to be kept informed of progress on the bug going forward. By doing this, it will ensure you're proactively informed of progress and updates going forward.