When using the terminal on code-server (VSCode probably does it as well), input is instantly shown on screen (grayed out, until the server actually responds):
When I connect to the remote machine using the OpenSSH client, however, the input is echoed only after a short delay. That's usually not very noticeable when latency is low, but makes it hard to type on slower connections.
Using the -T option to disable TTY allocation solves the issue, but severely limits the usability of the terminal.
Is there any SSH client with a similar feature to code-server?

moshseems to be what I'm looking for, but it doesn't supportProxyJumpyet [1] [2] (which I currently rely on). I might try using a VPN instead. Regardless, you should post it as an answer.