Just bought a pi4 kit with the official power supply. but im getting the low voltage warning. from what I read this happens when not using the official power supply which i believe iam. Should i buy another one in case this one is faulty?
Measure the voltage on the 5V pin on the Pi 4 GPIO pins. First thing I would check.
I have 2 Official Pi 4 plug packs and they sit around 5.1V.
Make sure the OS is not fooling itself, ensure it is up to date.
Reload the SD card with the latest version, or at least the legacy version for a Pi 4.
Use the Raspberry Pi Imager is the best way to do that.
It just might be the OS is an old version if it came with the kit.