It was very frustrating when they hide the proxy icon behind an obscure modifier key trigger and a delay in Monterey. Thankfully enough complains were made, and

It was very frustrating when they hide the proxy icon behind an obscure modifier key trigger and a delay in Monterey. Thankfully enough complains were made, and they've since added a toggle in Monterey 12.1 to always show proxy icon (Accessibility -> Display -> [ ] Show window title icons).