Can't clear recent calls after upgrade to iOS 17

This strikes me as a bit buggy. But, it appears to still work.

Pull one recent to the left but don't tap on the trashcan. The word "Clear" will re-appear and, when you tap on it, it will ask if you want to Clear all recents.

I recommend you submit feedback to Apple:

Product Feedback - Apple

Note that, as of this morning, iOS 17 was not an option in the drop down menu. Just make sure you put it in the text box.

Have you try this?:

Tap the blue i, then swipe left and tap Delete.

Tap Edit (top left), then tap Select and then tap Clear.

I see what you mean …

… is there never a display of “Edit” “Clear” or “Done” in the top corners of the “Recents” screen ???

(I’m still running 16 so I can’t duplicate your observed behavior)