Structural Assault

• WWizards of the Coast2022-04-29
  Official Ruling
  Structural Assault counts the number of artifacts that were put into graveyards from the battlefield this turn for any reason, not just because they were destroyed by Structural Assault.
• WWizards of the Coast2022-04-29
  Official Ruling
  If a player controls an artifact creature with a shield counter on it as Structural Assault destroys all artifacts, a shield counter will be removed before Structural Assault deals damage to each creature. Unless that artifact creature has another shield counter on it, the damage won't be prevented.

Rulings via Scryfall