In this section, we will see how to hide Quick Action Items in Oracle Fusion Page.
Let us consider below Quick Action Items under Procurement section.

Here we need to hide Suppliers (New) item Under Procurement.
Let us create new sandbox and navigate to Structure.

Navigate to Procurement as shown below:

Click on Procurement.

Click on Quick Actions.

Expand Purchasing.

Select Suppliers (New).

Select Visible option as No as shown below:

Click on Save and Close.
Publish sandbox.

Suppliers (New) option is not available now.