Just picked a black 2020 ST a few weeks ago (Wife's daily driver) but I've installed Amazon floor mats, ZL1 Addons splash guards, BOV adapter, Center console organizer/tray, Door grab handle organizer (for the kids), updated sync (hadn't ever been updated at all since new), and did some stock Dragy pulls for comparison against future mods.
I'll be adding a light strip under the hood lip, red door badges, license plate cover, Ford emblem overlays, center cap overlays, AA full screen mod, and some Forscan mods soon.
Future plans involve a tune, intercooler, wheel spacers, rear sway bar, LED light upgrade, satin black hood stripes, and possibly some tint on the moonroof and upper windshield.