Electricity can DEFINITELY make a sonic boom, it just has to be traveling through the air, but it happens all the time:
https://www.noaa.gov/jetstream/lightning/sound-of-thunder/learning-lesson-determining-distance-to-thunderstorm#:~:text=Overview,generating%20a%20%22sonic%20boom%22.
“Thunder is a result of the rapid expansion of super heated air caused by the extremely high temperature of lightning. As a lightning bolt passes through the air, the air expands faster than the speed of sound, generating a “sonic boom”.
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