Why is it that some photos does not show the sand being pink?

The best answer will be to understand what MAKES it pink.

What makes the sand at Horseshoe Bay Beach Pink?

The pink sand at Horseshoe Bay Beach is primarily due to the presence of foraminifera, tiny marine organisms with red and pink shells. These organisms, known as "forams," are single-celled creatures with calcium carbonate shells, similar to those of corals, mussels, and lobsters. When forams die, their shells drift to the ocean floor and eventually wash ashore, blending with white quartz sand. The pink hue is influenced by the intensity of sunlight reaching the sand, and the presence of foraminifera contributes to the unique coloration of Bermuda's beaches.