How do i make a place thats not the starting place public?

Ive been stuck on this issue for so long and my game wont work since its a multiplace game
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roblox wont let me make sunken public

So experiences/games are split into two things. You’ve got your overall experience/game, and then you’ve got a place inside of that experience/game. All places inherent from the overall experience/game.

In short, places don’t have a public/private setting, only experiences/games do.

Here are some relevant resources:

It should already be public. If not, you can try setting the starting place there, then setting it to public in roblox.com/develop (which might be hard to navigate to, since it might redirect to the creator dashboard).