Building IoT projects can be quite challenging and even more so for those without any electronics experience. While almost everyone can, given time, learn how to work with electronic components by following a detailed example, few may have the time to devote, or some may simply not be interested in learning more than is minimally necessary.
Qwiic system from SparkFun (www.sparkfun.com/qwiic)
STEMMA/STEMMA QT from Adafruit (www.adafruit.com/category/1005 ...