Just got my Maverick delivered and already installed the Muslogy trim piece around the radio controls (black wood grain). It looks great and I'm looking forward to adding other after market items.
It's hardly a mod, so far, but I did get a tray that mounts over infotainment screen that included a phone mount. But I'm eyeing things like the hood/tailgate spoilers or a sport bar and a spray-in bedliner.
But I did get a Ford FITS compatible trashcan for the back bench and some vinyl decals.