Please read this guide: https://forum.kicad.info/t/kicad-6-beginners-guide-to-personal-symbol-and-footprint-libraries/38738 in the FAQ. It is the same as I posted above. This explains how to move your personal libraries.
All you need to do is:
Open your Schematic and footprint library managers.
Scroll to the bottom of the list to find your personal libraries.
In the column titled “nickname” place a “0 or 1 or 2 or 3” in front of the name.
Any libraries with those numbers preceding the nickname will be seen in your list of libraries in the PCB and Schematic editors. They will be above the 4xxx Kicad Library.