The Cravenspeed Mini Mount works really well but is expensive: CravenSpeed Gemini Phone Mount for Mini [3rd Gen Models Only] (Magnet) https://www.amazon.com/dp/B07GC3PBGF/ref=cm_sw_r_cp_api_i_MGYqFbN70B7P4
There are quite a few cheaper knock offs of this mount but the one I tried was flimsy and didn’t fit right so I returned it. It was hard to tell which of the other knock offs was good with all the fake Amazon reviews so I just bit the bullet and bought the Cravenspeed.