Is this a carbon crank? If so, the threaded part for the pedals might not like being drilled and re-threaded for an insert to be put in it. May just be an insert itself embedded in the carbon.
If your threads are badly damaged, then trying to run a same size tap through it is going to leave too little material to be a decent fix for long.
If it's only damaged at the starting thread or two, then maybe there is hope for just running a tap through it. Or if your pedals have a long enough threaded part to reach all the way through, run them in from the other side and hope they push the damaged part into a better position. Maybe use an old pair.