I've used both chisel and frp to tunnel connections, then ended up using good old autossh. Just nothing beats it when you need a ubiquitous tool to provide a near permanent tunnel that will keep the connection up and use standard encryption.
In my experience SSH traffic is blocked quite regularly by corporate firewalls.
Do you mean the protocol, or just port 22?
Both. Some less sophisticated network gear might allow you to connect to an SSH server on port 80 for example. But usually you’ll have a traffic inspecting firewall that isn’t fooled that easily.