It should allow an SSH tunnel without installing the package above.

If you plan to access via. the internet you would need to open SSH to the WAN port. This can be done in the luci advanced settings under administration, if I recall correctly.

Then just create a normal SSH tunnel to your router WAN IP.

Note!
Opening Port 22 for SSH will cause a lot of automated attacks on your IP, it is better that you disable password authentication and enable certificate authentication only. If possible add additional countermeasures to SSH attacks, such as rate limiting and deny-listing (ie. fail2ban).

If any of this seems difficult, you may wish to focus on using the built-in VPN functions instead of SSH tunnelling, the GL-iNet VPN GUI is pretty easy to follow and does a lot of the difficult work for you.