Natural sat fats - like from dairy (if she can tolerate that) and meat - are good (it's the trans fats, the hydrogenated ones like Crisco, that you want to avoid like the plague!). Coconut oil is awesome, as is olive oil. If you're giving chicken, go ahead and use dark meat as it has more fat. (They need these for brain and nerve development). When she's old enough, eggs are good too. Oh, and fish oil and flaxseed oil (those are only for cold/room temp, though, not for cooking, but are great in dressings and dips and spreads) are high in Omega-3's.
But for now, if you can do it, breastmilk has a good fat content too. If she gets distracted nursing, can you pump and give it in a cup, or mix with the other food she's eating? My older nursed well till a bit over 15 months, but my younger decided at 8 months that even at 3 minutes (she was pretty efficient!), the breast was still too slow - but she'd drink expressed milk from a cup with a straw in 20-30 seconds - that was more her Spirited speed!
It's probably better to stretch in the mornings when they're relatively fresh if they let you, but too much stretching in the afternoons is when you're more likely to get an unsettled OT night sleep since they're running on adrenaline by bedtime.
This weekend might be a great time to try shifting things since the time is changing; you don't need to have any qualms whatsoever about putting her to bed an hour earlier or even more starting any time now, since starting Sunday that time will be an hour off on the clock. If you start now, perhaps you can shift her AM wakeup so it's not 5AM come Sunday morning! LOL I'd go a shorter playtime before supper, and a short time between supper and bed for maybe 90 minutes earlier, and see what happens. A longer winddown if she lets you might be good too, in her room in the dark, maybe quiet music or a sound machine if you use one.
Good luck! Hope something in there is helpful.