Before you proceed, you need Spaces installed on your phone.
How to enable all notifications for a tab within the Space?
Step 1 - Open the Space and navigate to the Tab for which you want to change notification settings.
Step 2 - Click on the name of the tab.
Step 3 - You can see the information about the Tab. Click on the Settings icon.
Step 5 - It would open up a pop-up screen, choose as per your requirements, notify regarding On all updates (post, comments, reactions, etc.), only on New content or Never. Then click on the Save button.
You are done!