To me “outdoor” rated wire means has strands of tinned copper. Pure copper corrodes so much faster than jackets fail from UV damage

We use the term “solar cable” to refer to a UV resistant jacket, but we use that term half incorrectly - as solar cables have a bunch of different parameters other than just the UV

Unfortunately I think the only true solution is something like McMaster-Carr or Digikey

Maybe we’re a dog chasing its tail thinking a single universal search box is feasible, when it may simply be impossible for all users?