Sorry just saw your other note. Take the .local and literally just replace it with .onion. Access it with Tor browser. If you don't see it, something else is going on. The server can be fully managed that way remotely.
Guess I should clarify first, are you doing the Lightning Piggy? https://www.lightningpiggy.com/
Or did you just mean a lightning wallet for the kids?
For any apps (like Zeus or Alby Go) to access your server, they need to use the server's Tor address. The interfaces menu has those listed for each app.
Discussion
Managed to do it. It was in the start9 settings. I enabled tor and was able to open a different LNBits version. Phew. Getting there ðĪŠ
Ah, okay. I thought it was on by default. I might have switched it on so long ago I forgot switching it. ð