If you’re already pretty lean, 10% seems waaaaay too low for a leaner person as your body needs to be fueled by fat in order to draw on the body’s own fat stores! Many leaner folks around here eat closer to 30-50% fat with steady results (rather than the typical 60-70% fat). I think variability - a degree of randomness - may be the critical thing to look at to keep the metabolism agile. Have days where you eat fat in your morning tea/coffee + 2-3 meals and get to the 30-50% place, and days where you have a small eating window time and no added fat beyond the fat in the morning beverage and in food and in cooking. Megan Ramos of IDM talks often of the importance of following any fasting with feasting to the point of stabilizing the body so it’s ready to change again.
Fat-wise, the medium chain triglycerides (such as found in coconut oil) boost the metabolism and fuel fat burning, ironically.
If you check out the work of keto-paleo nutritionist Nora Gelgaudus, the book Primal Body Primal Mind, she explains how fat is critical for fueling the mitochondrial metabolic power and digestive nutrient assimilation that builds muscle and bone. Not enough fat can create a bunch of problems on a cellular level.
90grams of protein isn’t high protein per se, and it may be needed for even small stature/lean folks who were protein deficient for years and/or are strength training (for more on that, see the book by LCHF/keto physicians the Drs Eades, called Protein Power!) Personally my first nine months of keto I aimed for 25-30g protein per meal at three meals a day and less on IF days. Now that I’ve had so much keto restoration of my brain & body and I’m not currently strength training, I do well with eating less protein, more like 45-60g day at my age of 52.