It's very unusual to follow keto and not loose weight.
Of course if you're massively over eating on certain things, like ladling cream in to everything, hoovering down cheese like you'll never eat again, then yes you might not loose weight. Common sense is clearly required, it's not a licence to pig out at every opportunity. Portion control is still required if you can't control youtself naturally.
As biwi said, I think some folks go a bit mad on it then wonder why they don't lose weight.
However when I've seen people who haven't lost weight then generally there is a reason for this. Silly things like eating too many nuts, having nights off, scoffing thr occasional high carb/ sugary treat thing thinking it doesn't count, or simply a basic lack of understanding of what to eat.
In general though I think we can all agree you don't need to calorie count. You just need to look at biwis boot camps to see this. There will be a small minority who need to.
As said I've done this for years on and off, and I've never had to, but nor do I stuff myself senseless on a continual basis. My appetite is suppressed naturally and I eat sensible portions, without little to no snacking.
I can't do that when eating carbs, I can eat a huge amount and go back for more, but when low carbing my appetite is naturally regulated and I can easily walk away after a correct sized portion.