Eating strike

Anyone else’s new 2 year old on one? My son has always a been super picky but always ate his few favorites but this past week going on 2 weeks he has been absolutely not eating meals but will devour snacks/yogurt. I’m not stressing about it because I know they know their body and will eat if they were hungry but I mean it’s killing me on the inside. How long does this last? He drinks water and isn’t underweight or anything but seeing him not eat actual food but eat all the snacks is annoying me ( I am not giving snacks all day just a few times so he doesn’t get full off of snacks)