If you are using Codinn Store or Setapp version of Core Shell / Tunnel, you are able to reuse ssh_config (~/.ssh/config by default).
This post contains critical notes about using ssh_config with Core Apps.
Include
For some technology reasons, ~ could not be parsed to your home directory, that is, /Users/username/. You should specify absolute paths in ssh_config file, for example:
Include /Users/username/.ssh/my_ssh_config