Yes I have had/am having the same issue.
The reason I started keto was not to lose weight but to stop imminent diabetes. However, I lost an astonishing 26 lbs in 2 months, and dropped my pants waist size by 2 inches. I am not 30 lbs below my pre-keto days and appear to have stabilized at this weight. I have never been a big guy but my higher gut was definitely getting bigger and a strong indicator of fatty liver.
My wife says I am now too skinny, however, I feel great, my mental faculties are better than I ever recall and I do not suffer from being hungry and I just feel more healthy. I also just eat when I want, which is typically 1.5 times a day.
My first question is why do you feel you have lost too much weight, particularly if you are feeling well? What is your definition of slimmed down too much? I believe our general societal perception of body image is over-inflated due to the past 50 years of ever increasing obesity. If you look at average people back around the turn of the century they all look kind of underweight, but that was probably more normal.
If you feel good and are not suffering from a acute or chronic illness and are not malnourished you may want to listen to your body and accept the weight it stabilizes at?
If you really feel you must increase body weight have you though of resistance training, with increased meat and fat intake to increase lean muscle mass, which will increase your weight?
Alternatively or in addition, try eating more animal and good plant based fats (avocado, coconut etc). While not the greatest for good fats, nuts are a good source of protein and fat, without a heavy carb hit that can help you increase weight without the detriment of going out of ketosis (if this is something you consider to be desirable).
PS eating a lot of cheeses also helps me maintain weight, if dairy is not a problem for you.