Add Per-Player Entity Visibility Control to the Script API

The Bedrock Script API currently does not provide server developers with a supported way to control whether a specific player can see a specific entity.

I am requesting APIs such as:

player.hideEntity(entity)
player.showEntity(entity)
player.canSee(entity)

These would control rendering per player, without removing or modifying the entity itself for other players.

This would enable many useful server features, including:

• Per-player holograms and NPCs.
• Showing different entities to different players.
• Hiding players from each other when desired.
• Minigames with player-specific entities.
• Quest/RPG systems with personalized NPCs.
• Reducing client rendering load by hiding unnecessary entities.
• Creating illusions and other visual effects without changing the actual server state.

For example, when a player joins, a server could create a hologram that is only visible to that specific player. Another player could have a completely different hologram in the same location.

This should be server-authoritative and only affect what each client renders. The entity would still exist on the server and remain visible to players who have not had it hidden.

A similar API for blocks would also be extremely useful, allowing servers to control which blocks are rendered differently for individual players without changing the actual world state.