After a few months of doing this, primarily to a) give my insulin response a break to increase "time in range" for BG, b) retrain my cravings so I don't graze throughout the day and evening, and c) reduce the risk of carb/portion creep through snacking/treats, I'd like to offer some tips that have worked for me if you're struggling.
1) Make sure your main meal at dinner is higher protein, fat, and/or fibre. A combination of two or more of those is better.
2) Hydrate during and after your dinner. Sometimes our bodies mistake thirst for hunger, plus fluid intake with meals increases fullness (particularly if meal is high fibre). If you're very low carb, particularly keto range of carb intake, this can be especially important.
3) For me, boredom is the enemy of abstaining from snacks. Admittedly, there are probably a thousand reasons we snack, but habit and boredom are two major triggers for me rather than actual hunger. Keep yourself busy or entertained. Read that book you've been meaning to, watch that TV show you haven't got around to yet, do chores, or just occupy yourself with something that brings you joy, and it will help take your mind off food.
4) A few others have mentioned intermittent fasting (IF). I intermittent fast probably 3-4 times a week, generally where I "skip" breakfast and go through from dinner the night before to lunch the next day. However, sometimes IF just doesn't cut it, I want to eat something but don't want a full meal. On these occasions, I turn the relevant meal into a snack and eat a smaller portion, centred around low carb snack foods. It can help scratch that snacking itch psychologically, plus if you track it then it lowers your overall intake / meal portion size (if that's what's important to your goals, for example, if you're trying to lose weight).