Webflow has not introduced a custom menu to replace the default browser menu when right-clicking on elements. The right-click menu in Webflow largely mirrors the default browser menu, allowing users to access basic browser functionalities such as copy, paste, and inspect element.
However, it's worth noting that Webflow is continuously improving its platform and adding new features based on user feedback and industry trends. Therefore, it's possible that they have introduced or plan to introduce a custom right-click menu in future updates. I recommend checking the official Webflow documentation or community forums for the most up-to-date information on any new features or updates to the right-click menu in Webflow.