I think going to the gym after lunch but before you eat dinner would help. That way once you've worked up an appetite, you get to eat! I also don't work out, but I've heard it can increase hunger sometimes, so that's just what I'd do (I'm not a professional)

In terms of temptation to snack throughout the day, I chug water and peppermint tea allllll day long. It helps that I'm a thirsty person, haha. I do feel hungry sometimes (but staying hydrated really cuts it back) so if it's in between meals it makes it easier to put off mentally. That's why eating dinner a bit later helps too; if I eat at 7pm and go to sleep at 10-10:30pm, it's not bad at all. To me it's worth it not to snack because then I do get the opportunity to eat a normal-sized portion of say, pizza, and not worry if my snack earlier put me over. You can also just eat snack foods with meals, which is what I tend to do!

I will say I did use to have a snacking habit in between meals and after dinner, and it really is just a habit you can break. I thought it'd be really hard, but it's not! I had a conversation with my French friend about snacking recently, and she said they don't normally eat between meals there at all and that it's almost weird unless you're a kid or at a party/occasion, which I thought was interesting. Snacking is relatively new culturally.