Samsung devices are notoriously locked down with Knox security. The introduces a streamlined "Auto Root + Network Unlock" for Exynos-based Samsung phones (A series, S series up to S21 FE). This eliminates the need for separate rooting tools.
The internet is filled with fake "v1650 download" links that contain malware, adware, or ransomware. Only 3% of search results for this tool are legitimate.
For advanced users missing the "hands-on" feel of v1650, tools like (Samsung flashing) combined with SamFW FRP Tool offer limited unlocking capabilities without the malware.
Although I couldn't find a specific changelog for version 16.50, here are some general features you might expect from a GSM unlock tool: