I don't think this can truly be answered accurately unless you provide a lot more information that you probably shouldn't post on an internet board, but I can hopefully make some comments that help interpret what's going on.
For one, 10,6% BF is really low for a woman. While it's not impossible, my guess is you're probably slightly higher than that. Body fat percentages are really, really difficult to determine. The most accurate methods are expensive and/or invasive and/or difficult to do. The cheap, easy, and less invasive methods are typically not as accurate. InBody themselves claim they're within 98% accurate to a DEXA but.... I have my doubts. Especially since only they make this claim.
Even so, 174 cm at weight: 56,2 kg is still pretty lean. The simplest answer to "Why I don't look like a bodybuilder" is you don't have a lot of lean mass. While "You make abs in the kitchen" is the common phrase. The truth is, you still need some muscle mass to have that "fit" look.
So while I don't want to over-step and say what you should do. I will say that you can consider a different approach. Rather than losing weight, maintain your current weight and build muscle in to it. If you eat at a maintenance, you can build muscle and you may change your composition to look more "fit".
Side Note: ECW stands for "ExtraCellular Water" and "ECW Ratio" means "ExtraCellular Water to Total Body Water" ratio. According to their website:
EXTRACELLULAR WATER/TOTAL BODY WATER ANALYSIS (ECW/TBW):
Ratio of Extracellular Water to Total Body Water; an important indicator of body water balance. In a healthy state, your ECW/TBW ratio should fall within the range 0.360 to 0.390. A value closer to 0.360 (or below) is commonly observed in athletes and reflects more Intracellular Water, Lean Body Mass, and strong cellular nutrient retention. Conversely, a value nearing 0.390 is indicative of greater Extracellular Water, Body Fat Mass, inflammation/water retention, and dehydration. If your ECW/TBW ratio exceeds 0.400, it is recommended that you consult your physician.
So a really low number means you're really lean. Personally, I don't see how this is really useful and seems to have just been added to make it sound fancier.