Why can planets in the habitable zones of faint dwarf stars become tidally locked?

Planets orbiting within the habitable zone of faint dwarf stars can become tidally locked due to their extreme proximity to the host star.12

Because these stars have low luminosity, the region where liquid water can exist on a planet's surface is located very close to the star. At such short orbital distances, the tidal forces exerted by the star on the planet are significantly intensified. These forces create tidal bulges on the planet, and the resulting gravitational torque acts to retard the planet's rotation. Over time, this process leads to synchronous rotation, where the planet's rotation period matches its orbital period, causing the same hemisphere to perpetually face the star.123