I’m using a Nikon Z fc. I’ve got it set on Snapbridge to automatically send 2mp previews to my phone as long. Sometimes I need to load up the app at the start of a shooting session, but most of the time it just works. The jpeg processing on mirrorless Nikons is better than most people’s Lightroom edits if lighting conditions were decent, so those previews are honestly what I use for about 90% of what I post.

I’ll say that the camera to phone connections were absolutely useless in the DSLR days. They might have become more usable towards the later releases, but I never would have been able to do this 5 years ago on my D750.