https://bugs.winehq.org/show_bug.cgi?id=46161
--- Comment #5 from Jacek Caban jacek@codeweavers.com --- Thanks for logs. For TLS 1.3 to be used, we'd need to add to protocol_config_keys in schannel.c as well. I tried that, but for some reason, the connection fails. It needs a closer look.
Also it seems that TLS 1.3 is not yet supported on Windows. PSDK has defines for it ready, but there doesn't seem to be the actual implementation. Still, we could have it, perhaps disabled by default...
However, I think that the original bug was about TLS 1.3 being used when it shouldn't be. That's because our gnutls backend doesn't disable it when it should. This part should work with the attached patch (I will attach a new version, because includes part is in Wine already).