Devs,
openSUSE Tumbleweed just had an issue with the sftp kio not detecting the ssh version with openssh-10 breaking sftp:// in konqueror/kate/kwrite etc. Yasuhiko has a fix. (I don't have a link yet). It apparently has to do with how a regex was written, likely the 2-digit '10' was too much for the old one.
Just a heads up. I'll see if I can get a link from him.