Launchpad has lost its background in Sonoma.

I make regular use of Launchpad. After the Sonoma upgrade (14.0), It has completely lost its background so that the app icons appear in front of whatever's open on the screen behind it, making those icons hard to see against the confusion. Also, it appears that the search field for an app has disappeared from the top of the Launchpad page too. I even tried command-F to see if it would appear. Nope. Makes it a real trudge through all of those icons if you're looking to open an app with it.