Keep in mind who was in charge of FEMA and the FCC at that time.
That had nothing to do with either agency. The infrastructure, meaning roads, bridges, power lines, potable water, power plants, sewers, police stations and government agency affixes was so thoroughly destroyed that outside of parts of the larger cities, nothing worked. Many towns had to have food and water dropped in by helicopter.
Puerto Rico is very mountainous except for some areas on the coast, and there are hundreds and hundreds of bridges that were damaged or destroyed, so the first issue was to get food and water in, and then start repairing roads and bridges. Even with heavy equipment and crews sent in, it took weeks to regain access many municipalities (PR equivalent of counties).
Note that I only count public bridges. Many housing developments in the hills around cities like the San Juan metro, Ponce, Mayagüez and Arecibo have one entrance that runs over a little gully or gorge that has a big culvert pipe, compacted earth and pavement over it. Many hundreds more such areas were isolated, with people unable to get in or out except by foot... often walking miles to get food.
It was not until roads and temporary bridges were taken care of that restoration of electricity, phones, cellular service, etc. could start to be fixed. And those home developments with bridges or culverts washed out had to wait until private enterprise workers finished the bigger projects... often weeks.
My example of Puerto Rico is non-political. The FCC quickly authorized any kind of temporary service, but the major TV stations had lost their towers and had their transmitter buildings and gear destroyed by the falling steel. A large number of radio stations had flooding, building or tower damage; the FCC does not fix broken stations.
FEMA did a fair to moderately good job. Its biggest issues were in the fact that Puerto Rico is an island about a thousand miles from the nearest cargo port (Jacksonville) and some of Puerto Rico’s port infrastructure was also damaged; some port areas had to be dredged to be accessible again. Air services were mostly, due to weight and size, limited to foods, medicines and things like circuit boards and antennas for cellular sites.
It took about 2 weeks to get a simple bulldozer to the Island. Just the port-to-port transit time is about 4 days. Add in a day to unload stuff at the port of embarkation, a day or so to load a full container ship, another day to unload on the Island plus transit to the the port of origin and away from the port of destination and you have 10 days at best and two weeks on average.
But throughout the storm and the rebuilding, at least one, and later, many radio stations were there.
Radio was the only communications working after the storm except for cellular in some small parts of metro San Juan.