What to expect at WWDC 2023, according to Ars Technica:
arstechnica.com
"Apple is also arguably due to update the 24-inch iMac, and of course, there's the long-in-limbo Mac Pro. We haven't heard specific credible rumors about that possibility at WWDC, but the timing lines up, so you never know."

What to expect at WWDC 2023: Reality Pro, iOS 17, and new MacBooks
Apple is set to announce its first new major platform in years.

"Apple is also arguably due to update the 24-inch iMac, and of course, there's the long-in-limbo Mac Pro. We haven't heard specific credible rumors about that possibility at WWDC, but the timing lines up, so you never know."