If you are just looking for a way to SSH into your machines from outside your network, you can setup a more recent VPN or Wireguard yourself. If you have a Raspberry Pi lying around, using PIVPN makes things super easy. You can have both OpenVPN as well as Wireguard running if you want, using the same script. If that is the only thing you like to do, then there is no need to reverse proxy your servers and expose them. Just having a VPN or Wireguard connection should be enough to access your servers when outside of your network. It is recommended to have a fixed IP btw, to find your VPN/Wireguard server easily.
Also, you can leave all your servers locally (and not exposing them) when you can reliably setup a VPN/Wireguard connection. That is the most secure I guess.