The real problem is that RENFE simply don't know when they will be able to run trains. Trains are simply cancelled until further notice.
RENFE, Iryo and the other companies only run trains, the track is maintained by a company called ADIF. As and when the track and other infrastructure is repaired by ADIF the Spanish Rail Inspectorate then have to approve the repairs. After that happens 96 hours notice has to be given to the train crew of their rosters and stranded trains have to be returned to where they need to be.
Given that the reality is that an amended signalling system is now needed that will all take time. So for service on 5 December the track would have to be fully rebuilt and approved for service with a different signalling system by 1 December. That is the earliest date anyone at all will know if trains will be running on 5 December.
Details of the rail replacement bus service on the northern section of the line are on the Spanish language version of the RENFE website- https://www.renfe.com/content/dam/renfe-viajeros/home/plan-alternativo-de-transporte-1.pdf
From everything which is being said by informed professional sources the likelihood of there being any real service known to be running by 2 weeks time would seem to be pretty unlikely. Not a zero chance, but a very small chance. If service is running it will probably be a very basic service, nothing like full frequency.
Given the very well developed long distance bus network in Spain RENFE etc don't seem to feel the need to duplicate those services with their own rail replacement buses.