That depends on the width and design of the stairs, how they are used and the applicable building requirements. Handrails on both sides can make it easier to find a secure grip, particularly for users with reduced mobility.
On a wide staircase, reaching a handrail on the opposite side may be difficult. Narrow or curved stairs need to be assessed according to their layout and local requirements. Where children or older people use the stairs regularly, accessible handrails are particularly valuable.
