Samsung is now rolling a new software update out to the Galaxy A70s. The OTA package adds the ability to use Link to Windows, as well as USB type C headphones. It also contains general stability upgrades and the October 2019 security patches.
https://www.notebookcheck.net/The-Samsung-Galaxy-A70s-latest-update-makes-it-compatible-with-Link-to-Windows.442646.0.html