LRC to LR (mobile) quality when editing

Howdy everyone! Had some questions concerning smart previews when editing. My computer is a bit ancient these days, so my workflow usually flows as import on computer to LRC, sync to LR, do most edits on iPad Pro. This works great for overall adjustments but I’ve noticed it seems to create some issues where I need to remove/heal a decent amount.

I recently did a shoot with a dog that had some bad dandruff and some wild hairs here and there. Everything looked good on the iPad, but I needed to switch over to PC and PS to do bulk healing/removing. Once I was on PC the spots I removed/healed in LR mobile looked absolutely atrocious, since I was seeing full quality. So I basically had to go back and fix all of those on PC.

So my questions are: 1. Does LRM do remove/healing at the Smart Preview resolution, or does it calculate it to the full resolution? 2. Is there a way to see full resolution if going LRC to LRM, or will I need to switch up my workflow if iPad is general edit? 3. I can test later today, but does uploading to LR on PC give me full resolution on LRM, so I could sync from PC LR to LRC and have good resolution on iPad removes?

Thanks!