This functionality is already available on our Premium Plan, you can hide a collection so it’s not visible on a public link. However, if you add someone as a viewer, they’ll be able to see those private collections after logging in. You can also add password protection to your brand space so only invited viewers can access it securely.

We really like your suggestion about displaying locked collections with a “Request Access” option instead of hiding them entirely, that’s a great user experience improvement. We’ll explore adding this enhancement in a future update.