Daily Chess is very different from Live Chess. Live Chess has short time controls and games are completed in one sitting, while in Daily Chess several hours or days often pass between moves. For this reason, the Fair Play rules surrounding Live Chess and Daily Chess differ slightly. In Daily Chess, you can use any form of assistance that does not involve an engine, a human, or a tablebase. In Live Chess, no outside help of any kind is allowed—you should always be looking directly at the game in front of you. Using a different board to keep track of moves and look ahead would be considered cheating, and this is one reason why conditional moves are not allowed.
Besides, especially in bullet or blitz, there really isn't much time available to add a line of move predictions and conditional moves (in contrast to Daily Chess where you have hours or days). And anyway, adding this feature would completely change the nature of Live Chess. All around, it's not going to work.
Add conditional moves to Live Chess