2.5kg fat-loss in a week is plain impossible for most of us under normal circumstances, it’s not realistic. I simply never had a big enough body to be able to do that even theoretically (but I was very happy with my 300g on low-carb).
But doing keto doesn’t mean we will lose any fat, it’s not magic… We need to eat properly, it’s only/mostly calories in my case, apparently but many items may interfere according to many people’s experience (my problem items interfere with my macros and well-being even if they alone can’t stop fat-loss so I avoid many things myself). Some tweaking may be needed. But maybe patience is needed, your body may focus on more important things than fat-loss. With your weight fat-loss can’t be particularly important health wise and many people has problems losing when our weight is already this low (even if it’s still a bit high for us).
So, I would wait first.
How much do you eat in macros? Exact percentages usually don’t really matter, I only keep that in a smaller range because of my taste most of the time and because a too high fat intake would result in either too little protein or overeating. Some people are more sensitive to that and therapeutic keto often has its specific percentages but one can do keto and lose fat with 60% and 80% fat alike. Or less or more but I hardly could pull off that without messing with my protein or calorie intake. But it may work for someone else. (Surely some people go over 90% fat as they need A TON of calories and there is a thing as too much protein. But it’s an extreme case.)
Don’t worry about protein, most of us can’t go too high. I always stop at 220-230g (my need is hardly above 100g but I need more for satiation) but I am a short woman without much muscle mass or activity. Some people in this forum regularly eat way more without problems.
Makes exactly zero sense to me but people are interesting, maybe it’s true for someone, directly or indirectly… Too much protein is unhealthy though but it’s a huge amount, first we have unnecessarily high territory, I live my life there. 2 times my need in average (my vague guess but definitely not much less than that) but I feel fine and have no idea how to go even lower… My body likes it, it’s just not strictly needed.