Has there been a Super Bowl when no touchdown has been scored? That answer is apparently: no.
Super Bowl LIII (2019): New England Patriots 13, Los Angeles Rams 3 — the lowest-scoring Super Bowl ever (16 total points), with only one touchdown (a fourth-quarter run by Sony Michel for the Patriots; the Rams scored only a field goal and never reached the end zone).
Super Bowl LIII (2019): New England Patriots 13, Los Angeles Rams 3 — the lowest-scoring Super Bowl ever (16 total points), with only one touchdown (a fourth-quarter run by Sony Michel for the Patriots; the Rams scored only a field goal and never reached the end zone).