Razer has unleashed a version of its Raiju controllers for smartphones. It is ostensibly designed to compete with similar products made by Xiaomi and Asus, although it may fit devices besides the company's own gaming-focused smartphones. The 'mobile' Raiju features the Mecha-Tactile action buttons found on the Ultimate variant of this controller.
https://www.notebookcheck.net/Razer-releases-Raiju-controller-for-mobile-devices.381296.0.html