"Current estimates put breaking 256-bit encryption (including SHA-256) 20-30 years into the future when quantum computers may have enough stable qubits and error correction to implement Grover’s algorithm at scale. While Grover’s algorithm reduces the complexity, SHA-256’s security margin is still considered adequate against such brute force attacks."

https://itoolkit.co/blog/2023/08/will-quantum-computing-break-sha-256-encryption/