An idea for buried treasure

My idea makes buried treasure easier to find. Now, I know on Java you can use the F3 screen and find the 9 9 chunk coords, but Bedrock players don't have this ability and it seems kind of cheaty anyway. Now, we could just do the obvious thing and have an X marking the block the treasure is under, but then players could find them regardless of if they have a map or not. But I propose that the X's would instead be a particle effect coming from the block that is only visible to players with the corresponding map in their main hand or off hand. This way, players would still need to have a map to find the treasure, but people who go through the hassle of finding the right place can easily find the chest. :)