It seems that Apple introduced new Metal API messages in MacOS Ventura. The result is that I've seen a few software vendors struggle with their apps causing screen flickering in full screen mode. Is this a known issue for VMWare Horizon? The workarounds for me are:
Lots of discussion about this issue over at JetBrains: macOS-Ventura-Screen-flickering-after-OS-update-when-IDE-is-full-screen.
Per one of the developers over at JetBrains, they replaced the per window synch with a per monitor synch to resolve the problem. Hopefully VMWare notices this and can leverage the same strategy. The flickering is terrible!