I'm using Zero Trust Tunnel for some web apps I host in my home, but I'm trying to think if the older service (IPv4 to IPv6) you describe would be useful for an

I'm using Zero Trust Tunnel for some web apps I host in my home, but I'm trying to think if the older service (IPv4 to IPv6) you describe would be useful for anything, like ssh'ing into my home from an external VPS. Would the earlier product be used for something like a router, which can't run the Tunnel service?