From community posts (XDA, GSM forums), v53 adds:
One of the biggest hurdles in recent MTK devices (Helio G90, G99, Dimensity series) is the "SLA" (Secure Lock Authority) and "DAA" (Device Authority Authentication). Version 53 introduces a refined bypass algorithm that successfully negotiates handshakes on Android 12 and 13 devices where older versions (v49, v50) failed. free mtk client tool v53 updated