Chance Miller, 9to5Mac:

Apple yesterday released the third developer and public betas of iOS 15.2, and in addition to the changes reported yesterday, the update also includes a notable tweak to the Music application. For the first time, you can now search within a playlist for a specific song.

This does deserve a “finally”. Especially if you put effort into building a playlist of favorites that you listen to regularly.

In typical Apple fashion, the search bar is hidden within the user interface. To find the new search field, open a playlist in the Music app on your iPhone, then swipe down from the top to reveal the new “Search” field.

That pulldown to reveal the search bar is low discoverability but, to be fair, it is a device used pretty consistently throughout iOS.