[ClashTheBunny]

I think you want multiplexing:

https://en.m.wikibooks.org/wiki/OpenSSH/Cookbook/Multiplexin...

It creates a control socket that lasts up to x minutes after your last session closes, so for me, all day + 15 minutes, which then new connections go over instead of re-athenticating.

Many places disable it for "security" reasons.