Similar to toothpaste, rubbing soap or a matching crayon over a tiny hole can fill it cosmetically.

Soap Method: Rub a bar of white soap (similar color to the wall) firmly over the tiny nail hole until the soap fills the void.
Crayon Method: Choose a crayon that closely matches the wall color. Rub the crayon tip over the hole until the wax fills it.
Wipe away any excess gently.
Note: These are temporary cosmetic fixes only, not durable repairs.

N/A - Quick, simple ways to temporarily conceal tiny pinholes.

Use Bar Soap or Crayon (Tiny Nail Holes)