Yes, STRAP is a Scrabble word!

Letter values in Scrabble US: S 1, T 1, R 1, A 1, P 3.

Is it a valid word?

STRAP is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

an elongated leather strip (or a strip of similar material) for binding things together or holding something in position
hanger consisting of a loop of leather suspended from the ceiling of a bus or train; passengers hold onto it
a band that goes over the shoulder and supports a garment or bag
whip consisting of a strip of leather used in flogging

STRAP was the Wordle answer on June 16, 2023 (#727). Stuck on today’s? Use the Wordle helper.

Also: shoulder strap.