I tried IF for a while. I lost a couple pounds and then plateaued. What I realized is that the main thing it was doing was preventing me from snacking at night. I didn't really eat any more than normal during the eating period, I just didn't eat my usual outside of it. So exactly in line with the study. It just didn't do much for me weight-loss-wise. I was already skipping breakfast most days, so waiting until lunch…
Their IF (or eTRF) groups stopped eating at 2pm each day. Presumably they went to bed a earlier than you, as their breakfast was at 8am, so shifted by your two hours that would mean no food after 4pm.
I'd have a hard time doing that. In a way, dinner is a reward for the day's accomplishments for me. I'm not saying it's impossible to adapt to that, but I'd rather work out more than fast for 16 hours every day.