Best way to attach phone to bike? - lemm.ee

Hi all, I just got a new bike and I want to find a good solid way to attach my mobile phone somewhere near the stem. I want to be able to track some of my rides and use the phone for navigation sometimes too so it has to be visible & touchable wherever I mount it. My bike (Cannondale Topstone 2 gravel) has mounts for a top tube bag, or I think I’ve seen some sort of secure mounts in use by folks I ride with. What’s your fave solution for this these days? Cheers!