I thought you meant do I use self-demand eating MYSELF
pmsl, yes, I eat what I want, when i want
But I realise what you mean.
I think DS also eats what he wants when he wants, tbh.
I am pretty relaxed about food, and DS has snacks, the only thing I do try to ensure is that the food we have in the house is what I would want him to eat, iyswim.
The onl;y thing I despair about is veg, but then I remember I only ate peas and carrots for the first 7 years of my life, but as an adult I eat and enjoy a large variety of veg.
DS seems to self-regulate a lot. E.g. if he's eaten a very carby lunch, I notice he'll eat mostly protein & fruit for tea.