I tried to warn y'all about inexpensive LED's on one of my first threads here because these are so well liked.
Do they look nice? Yes. Do they fit good? Seems so. Do they work when first plugged in? Absolutely.
But LED's have to be made with some quality to brave the outdoors and elements for a long period of time.
I've even had bad experiences with "reputable" companies like Diode Dynamics.
Bought my set "pre-Tectico" back when it was "DZG" side marker lights 1/2022. (Pretty sure they're all the same) Still working. Yours failed too early. Contact them and maybe they'll help you out?