They won't need to go to tender again. The company that did the original plans also arrange the build. They might go back to talk price given material cost.......but the key point is....they have gone to the back of the queue. There are a number of other projects that the building company has prioritised.
Relegation meant that the expansion plans were shelved and no indication was ever given to constructors on when they would start again. For that reason, other projects have been prioritised. This projected from the LCFC side is totally at a stand still.
Also the whole premise of this is hospitality/bars/food etc etc. Match tickets are a fraction. When the designers came in and saw the KP they said that the stadium was designed incredibly badly when it came to how people get a drink/food and it wasn't designed with revenue in mind.