In short, yes, you can eat too much fat. In the above question, I talked about calories and how they’re still important for us. In the end, we still need to be at a caloric deficit for us to lose weight. Eating too much fat will push you over that calorie deficit, and turn it into a calorie surplus. While most people will find it hard to actually overeat on a low carb high fat diet, it is still possible.
You can use the keto calculator to calculate your macros and see how much fats, proteins, and carbs you should be eating a day. Keep in mind when you fill this out, you can edit the values of your protein and carbs (and should, depending on your activity levels). If you have any questions on this, please let me know in the comments.