Earlier quoted context omitted.
FWIW, I have a DSLR (used to be semi-pro, now just a hobbyist). I use Lightroom and Photoshop on my iPad. I never touch my desktop anymore. Clearly, your workflow may require desktop software. But I believe it's possible to create high-quality work without a desktop these days.
Where do you keep your raw files? That would fill up an iPad fast. I know Adobe has cloud storage with their photography plans, but I can't imagine ever not having a local copy.
And iirc, I have Lightroom set up to export a JPEG of the last edit for the photo to a directory. So I back up the edits too.
It's really a pretty nice experience. The new lightroom moved a bunch of stuff around and some of the more advanced stuff is hidden, but it's a lot easier to make quick, rough edits. I like hitting the auto-edit button when I'm filtering out photos that are trash, because sometimes photos I think I hate look a ton better with rough editing.