Hmm. If it were me I would feed her the extra, just nothing exorbitant.
Few reasons:
She has some wiggle room, not currently overweight. You can always weigh her every other week on a home scale to keep a loose eye (I wouldn't do more frequently because they don't gain weight that quickly, and even something like a full bladder and poop can affect it quite a bit)
When they are unregulated they can't process the food as well. You may notice she's more hungry in higher numbers (and also in lower numbers lol).
If she's getting hungry at certain times early in the cycle, that's actually her body helping you out. It feels the drops coming/happening, and tries to slow it down.
I free feed my cat. I set out a can in the morning, and again at night (when he was unregulated he was actually doing 4-5.5oz cans a day, his ideal weight is 14-14 lbs). He actually fed his own curve which made things much easier for me. He ate the bulk of the food early in the cycle while dropping, then barely touched anything at all in the later part. Kept him fairly nice and flat every cycle, almost never bounced.
But - some cats will just gobble it all up at once and it shoots you in the foot if you have to intervene with food later at low numbers, because they won't be hungry. I think it's worth an experiment though, leave food out and see what she does.
The idea behind meal timing is you want to strategically feed to keep the curve as flat as you can. Going off the night data, you can see she starts to drop sometime after +2. It's not a bad drop compared to others I've seen, but it could be slowed down a bit. So the snack at +2/+3 is perfect, just may need to tweak amount to slow it a bit more, and possibly another +3/+4. Some cats cooperate, some don't lol
The other thing about "feeding the curve" is a flatter curve allows you room to increase the dose to get all numbers down overall. Some cats plummet from 350 to 90 daily which is a rock and a hard place - no room to increase insulin, but still unregulated. Sometimes meal schedule helps, sometimes have to change insulin.