You will notice a Search bar on the top of each page of LTK App. This can be used to search for any products or creators on LTK.
Please note that this feature is used to search all looks and items on the LTK app, not just your specific feed or saved post.
You can Search for a post in a specific Creator's Shop by navigating to their Shop and then using the search bar below their profile information.
LTK Creator Shop Search