Pointing behaviour in humans usually emerges in the first few months of an infant's life, before any language skills. By one year of age, around 50% of infants use pointing to draw attention to objects out of reach.

It's not currently known to what extent pointing might be a 'learned' behaviour - or whether it's completely innate.

The emergence of pointing is a central developmental achievement. Yet, little is known on its ontogenetic roots.

Source : Cognitive Development, Volume 65, January–March 2023, 101298

( Note that some other animals are known to use pointing - e.g. Bonobos.)