That looks like one happy toad. Mine was down in a hole like that for weeks simply resting and enjoying himself. Sooner or later he came up because he was hungry and the fiber started to dry out.

It's a blessing to be able to view them when they bury deep like that.

Your temps are right around what my house is and most of my toads, both American and Southern spend most of the time buried in their substrate with the odd one coming out to soak or sit near the food dish.