Should I confront him on his eating habits or am I overreacting?

So, this is a long term relationship issue with my (21F) boyfriend (26M). We've been dating for nearly 3 years now and for most of that he's complained about his weight.

Just over a year ago, I started a weight loss program and have lost a significant amount of weight just through changing my diet proportions (more veggies and fruit, less carbs, more water, less juice, that sort of thing). I've never been a gym bunny or even an active person so most of my 10kg weight loss was done through diet.

At the time I tried encouraging my bf to adopt some of my weight loss "techniques" like drinking water instead of cool drink and eating more veggies, etc and he was resistant but said he was doing so. We don't live together so he bought his own groceries and all that. I never really felt he was on board with this idea, despite him saying he feels he needs to lose weight, and he never showed any signs of "taking part" when he was by my place (small things like never asking for water, always cool drink, wanted to snack on sweets and chips over popcorn, usually suggesting ubereats over cooking a homemade meal). It really disheartened me... these interactions have been happening all through the year (lockdown included) and he doesn't seem to want to change.

Recently when he was over, he logged into ubereats on my laptop to order. He must have forgotten to log out because when I was checking it for a lunch option (as a treat since I was super busy and didn't really feel like making my own lunch), I saw that he'd made an order after he'd been over to my place. Since then I've checked a couple times and in the last 7 days he's ordered ubereats (mainly McDonald's and KFC) 11 times. I've offered to go grocery shopping with him when we were out once and he said he didn't need anything.

I don't know whether to talk to him about this, confront him or just leave it be because I shouldn't know about it anyway and I feel weird and guilty "spying" on him like this. I don't know if I'm overreacting, but his weight is bad and he does need to lose from a health perspective. I know it's a sore point for a lot of people but it shouldn't be this hard to try convince someone who's already unhappy with their weight to try adopt a healthier lifestyle. I've tried calmly talking about it because I don't want to annoy him with it, which is why I'm giving different options of confront and talk.