No, the TT520 II is a manual flash and does not support HSS or TTL. Its maximum sync speed is typically limited to your camera's native sync speed (usually 1/160s to 1/250s).
Yes, the Godox TT520 II typically comes with a dedicated RT remote transmitter that fits into your camera's hot shoe to trigger the flash wirelessly.
Yes, it is compatible with Sony cameras featuring the Multi-Interface Shoe (MIS). It operates as a manual flash on these bodies.