Cranial Plating

• WOTC Official Reminder Textofficial rules
  Equip — Equip [cost] ([cost]: Attach to target creature you control. Equip only as a sorcery.)

• WWizards of the Coast2021-03-19
  Official Ruling
  Cranial Plating is counted by its own ability, so it gives at least +1/+0.
• WWizards of the Coast2021-03-19
  Official Ruling
  Cranial Plating's first activated ability is similar to an equip ability, but it's not an equip ability. Most importantly, it can be activated any time you could cast an instant, even during another player's turn.

Rulings via Scryfall