Just use picocom in any terminal you like: https://github.com/npat-efault/picocom (unmaintained, but works fine and there is a ng fork: https://picocom-ng.oddbit.com/). Or minicom or screen, but those are more bloated.

There is little reason for SSH client to be integrated into a terminal emulator. Admittedly, my favorite kitty has a wrapper around OpenSSH, to fix terminfo and stuff, but it doesn't tries to re-implement the protocol. There is even less reason for serial port terminal to be a part of a terminal emulator - serial port terminal simply sets baudrate, remaps some control characters and gives you an escape key, it is not connected to rendering in any way.