How long does the iPhone 17 Pro store clipboard text?

How long does copied text stay in the iPhone 17 Pro's clipboard? For example, if I copy text from the Notes app on my iPhone 17 Pro, how long does it remain there? Is it deleted immediately when I copy another piece of text? Also, how can I see everything stored in the clipboard—or is only one item saved at a time, with the previous one being overwritten? Thanks.