Ah, that’s a different concern from what I was reading into your other post, sorry!
If you continue eating this way, you should eventually stop losing fat and hit a point of stable weight. If you continue eating enough protein and fat, your body might even put on some muscle and increase your bone density; it’s been known to happen, as long as people eat enough.
We think of keto as primarily a weight-loss diet, but it’s actually not; the metabolic healing from eating this way causes weight-normalisation. It’s just that most people in our society who need a keto diet are overweight or obese.
Something to remember, when considering how much to weigh, is that our perceptions of “normal” have been skewed over the past fifty years. I well remember watching the 1950’s movie Houseboat on television as a child, back before the dietary guidelines were first promulgated, and thinking that Sophia Loren was very shapely, but quite well-padded. I recently came across pictures of Ms. Loren from that era and was surprised to see that she now looks thin, not zaftig. That’s because “normal” has changed. When your fat loss reaches a settling point, you may be told you look emaciated, but you probably won’t be, especially if you aren’t fearing fat and calories.