You can accomplish this with a Category Selector, added either to a header bar or a side panel. You can configure a category selector to behave like a search bar, allowing users to enter text to view matching choices.
Set your category selector to Grouped Values. Set the Category field to your project's identifier.
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Then in the selector's settings, enable the Filter capability. Your users will be presented with a dropdown menu of the categories, and by searching in the box, they can find any projects that match the input string.
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- Josh Carlson
Kendall County GIS