The external monitor is as simple as it gets with nothing but two USB-C ports, power passthrough, and a surprisingly decent 1080p display with respectable response times, 95 percent sRGB coverage, and a 300-nit backlight all for $269 USD.
https://www.notebookcheck.net/14-inch-Dell-C1422H-portable-monitor-review-Lightweight-and-basic-with-no-extras.595270.0.html