Why is there no viewfinder on smartphones?

[Android Central Question]

There appears to be no phone or accessory that provides a viewfinder for a smartphone. It must be a universal experience that the rear monitor is almost unusable in sun. I do a lot of mountain hiking and many of my photos are taken without me even being able to see what the camera is pointing at.

Is there such an accessory? If not, could someone give me an idea why there isn't? Sure seems odd, given the engineering magic that is put into smartphones, that not one offers a viewfinder. I have a Galaxy S6. Thanks much. Don

 

[B. Diddy]

Welcome to Android Central! Maybe something like this would be helpful, but I've never tried it: https://www.amazon.com/dp/B01DNRA35S?tag=hawk-future-20&ascsubtag=UUacUvbUpU6216515