It is the job of the person merging onto the freeway to find a safe place to merge. The person on the freeway is also able to move out of the right lane if they so desire, but they aren’t required to from what I understand

Part of merging is to let the vehicles merging safely merge. That might mean slowing down a bit, speeding up a bit for a moment or moving a lane over. The only time when doing nothing for a merging vehicle is okay is when there’s literally nothing you can do due to the quantity of traffic