How a letter travels from phone to screen
Each keypress is delivered over your home network as its own remote command — the same channel the physical remote uses, which is why nothing needs pairing. Accented and non-Latin characters survive the trip intact, so a French password or a Ukrainian search phrase types as written.
Because delivery is per character, the TV shows your text growing live rather than receiving it in one paste, and whatever autocomplete you use on the iPhone works: the TV only ever sees the final characters.