When modelling a sample $(x_1,\ldots,x_n)$ as an iid sample from a given distribution $F$, the correct modelling is to see this sample as the _realisation_ of a random variable $(X_1,\ldots,X_n)$ made of $n$ independent random variables identically distributed from $F$:
$$(x_1,\ldots,x_n)=(X_1,\ldots,X_n)(\omega)\qquad\omega\in\Omega$$
The concept of $n$ realisation of a _single_ random variable is a shortcut as is not well-defined because one cannot handle independence with a single random variable.