Sorry, when I say missile boats I mean with the missiles fireable and usable. The Albatros for instance (the German FAC) has 4 Exocet Launcher but they’re all unusable, hence not (in my definition) a Missile Boat
Japan probably does have missiles on some of those ships irl, but doesn’t in game
The Leopard-class represented by HMS Leopard in-game eventually were refit with Seacat missiles, but other than that the UK has no missile-carrying craft in-game.
I might suggest the county class to be introduced to war thunder, probably as one of the batch A with 2x4.5-in, or the Glamorgan since she did gain some fame in the falklands, with exocets artificially removed.
Correction HMCS Terra Nova’s 1990 retrofit gave it a Harpoon missile launcher along with other things. So that’s another thing that could have gotten missiles.