Can astrea snails burrow?

Hello everyone!
I moved my snails over from one tank to another and thought Thomas was on my aquarium heater but I was mistaken. I didn't seen him on any of the rocks but am unsure if he maybe was in the sand or if I buried him.

Can saltwater astrea snails burrow? I haven't seen him in a while and am uncertain if I should dig through the sand for him.

Edit:
Can they survive a while being buried? It would have been a couple days if so.
I am uncertain how to react here. Thank you so much for any help/advice.