The Razer Kishi is clip-on controller compatible with a huge range of Android phones that support USB-C. This is why I think it
Razer Kishi V2 review - GadgetMatch
Razer Kishi for Android (Xbox) Review
Razer Kishi for iPhone review: Next level iPhone gaming
Project xCloud: Does the Razer Kishi controller work with Xbox Game Pass and xCloud mobile streaming?
Master Your Mobile Gaming Experience with the Razer Kishi Mobile Game Controller, by Salim A. Hashimi
Razer Kishi for iPhone - Download
Razer Kishi review: the most convenient phone controller - The Verge
Razer's Kishi is the Switch-style phone controller I've been waiting for
Razer Kishi for Android (Xbox) Review
Razer Kishi V2 review - GadgetMatch
Universal Gaming Controller for iPhone - Razer Kishi