I can’t believe a bird(s) strike would do this. Modern engines are enginered to take care of this problem. My first choice would be out of fuel then a electrical problem.
A goodly number years ago a 727 belley landed in Long Island. After the investigation it was found the fuel tanks were dry.
Just my thoughts.
If it had been a strike, the evidence of the strike would have already been found. However, no turbine engine is proof against a bird strike. A big enough bird - or enough birds - will kill a motor. Look what the geese did to the AWACS up in Alaska several years back.