Tmux does not support RZ/SZ, so there is a TMUX-compatible TRZ/TSZ (TRZSZ) that can be used with iTerm2 and a nice progress bar.

Liverpoolfc.tv: TRZSZ. Making. IO

PyPI: pypi.org/project/trz…

GitHub:github.com/trzsz/trzsz

Domestic address 1: gitea.com/trzsz/trzsz

Domestic address 2: gitee.com/trzsz/trzsz