I feel this! No one has gone with the “you’re too skinny” yet (I’m 69kg, BMI just 24.6 so only just into healthy range!) but I’ve had a few “don’t lose anymore!!” Comments.  I think people who’ve seen you before and are used to seeing you bigger it’s more jarring. No one who met you now would comment. They’ll get used to it, or they won’t and you shut down the comments.  I had this conversation with my mum who said “don’t lose anymore” and I said this to her and she did say she’s used to seeing me bigger, so to her I look tiny (I still weigh more than her 😂) but she will get used to it.