Mostly just overall for the day.
If you’re eating, say, 20-25 grams of carbs for the day to get into ketosis, then it might be “ideal” to spread them out over however many meals you choose to eat, but realistically, it’s not going to matter that much.
I would shoot for at least 20-30 grams of protein at each meal, so typically 3 meals or if on a lower protein intake maybe 2 meals.
If you’re choosing whole foods then typically you will get a variation of fat & carbs with each meal – my breakfast is typically zero carb (bacon, egg, cheese)
I am a bit skeptical about adhering to macros. It is not because I don’t agree with them but because I don’t know how to, or find it tedious, to count them. And then again, I am against having to “stress” about them each time I plan to eat something. Why can’t it be simple? Why should I have to spend so much time to (a) check the glycemic index – sometimes the type of food I plan to eat is not on the list (b) weigh each item of the food that I plan to cook, (c) calculate net carbs vs total carbs, etc etc..
Please don’t get me wrong; KETO is great, I have lost 25 lbs but find it cumbersome especially when you want to convince others.