umateli, with my limited Google researching, I was not able to find any evidence that FTP Voyager uses TLS 1.2. Here on the SolarWinds site, I see that the MFT Server supports TLS, but the page doesn't say which version(s) of TLS (but that's a server, not a client, so probably doesn't apply to your case). So, the short answer to your question appears to be "Not yet."
I have upgraded FTP Voyager client to current free Version 18.104.22.1688 but then it didn't worked. When again enabled TLS 1.0 it starts working.
For PCIDSS compliance standards TLS 1.2 should be in use. How can we tackle this if I want to use FTP Voyager client only? I have jobs configured on it so I cant migrate to other client that easily. Hence, if any paid version available for FTP Voyager that I can support TLS 1.2 it would be great.