@Frederic thanks for response. Photos would have been right to do, but did not cross my mind.
I brought it back to Toyota for them to inspect, and they checked the throttle body, there are no sand deposits in there.
They are confident that if sand entered the engine there would be some accumulation in there so they say do not worry. I did see sand in the intake pipe after the 1 hour drive home, but it is really impossible to know exactly how much went through.
Also, I did not see them open it up myself so I’m trusting that they won’t clean it up first to cover for themselves 😅
@Frederic yes stock box