It definitely works with African cichlids, and I’ve seen it work with Central Americans when mixed in a wide size range, but it can go wrong from one day to the next. I would recommend, instead, non cichlid species like large silver dollars or medium tinfoil barbs. Add 3-5 as dithers to bring your fish out without risk of aggression.
By the way, I’d call that a Thai silk kamfa, whether there Is such a thing or not. Beautiful fish, and most likely a male. The breeders tend to hold on to or cull 90+% of the females.