I use this Mueller top/bottom strap to help with a lot of minor but annoying knee issues (like Osgood-Schlatter’s Disease and Patellofemoral Syndrome). After trying a few seems to work the best for me.
These are what I use: https://www.amazon.com/dp/B002WS49FA
Mueller Sports Medicine Adjustable Max Knee Strap, Patella Tendon Support, for Men and Women, Black, One Size (Pack of 1)