The Telerik UI for .NET MAUI PdfViewer has a support for text search functionality which allows users to find and highlight text inside a PDF document.
You can take advantage of the built-in search toolbar items or search programmatically through the provided methods. With the built-in search UI users can enter text and browse through the search results. In addition, a small toast message on mobile showing the count of the search results or a localizable message in case no results are found.
Here is how the default search toolbar looks on mobile:
Here is how the default search toolbar looks on desktop: