I have a canon 70d (2013)

It has features that let it set up as a wifi hot spot a phone app that previews. It works but its really user unfriendly and a pain to use. Hopefully they've gotten better.

https://www.dpreview.com/reviews/canon-eos-70d/8

I had a friend that used to use (maybe still does) a sd card with wifi to remotely access the pictures from a phone. That seemed to work pretty well.