To add new tables to your portal or shared view while keeping them hidden from your users, you can use the Conditional Table feature like this:
Add the New Table: First, create or add the new table to your portal or shared view.
Open Table Settings: Once the table is added, open its settings.
Set a Condition that can't be fulfilled by a normal user: Navigate to the “Conditional Table” section and set a condition that only applies to your test user. For example, you can use a condition that searches for a string that only applies to your test user record:
By doing this, you can continue working on the new table without it being visible to your users. Once you’re ready to make the table accessible, simply remove the condition and the table will be available to everyone.