Search and Filter items in a list
First, open the Lists section, then select the list you want to find an item in. To search, click on the search icon on the top right of your screen. The search applies on the item name, as defined in the web application.
To be able to search on item attributes defined as important in the web application, or filter items on other attributes types, like single / multiple choice, phone number, number, click on the filter icon to open the panel.