I agree with @dtstellwagen's answer - give them best answer. We recently got our kitchen remodeled, and ultimately what matters is what the inspector says, both electrically and mechanically.
What you have in mind fulfills the spirit of the NEC, if not the letter. Doing the opposite of that, tapping some other receptacle or lighting circuit for the microwave, is probably a no-no. Your 2017 home would have arc fault protection on, say, the dining room receptacles, and a microwave would lead to nuisance trips from the arc fault, if not plain overcurrent. How do I know? Because the ding-dong remodelers did exactly that, and didn't mention it to the inspector, who let it pass. I fixed it myself, running a dedicated circuit for the microwave in the cabinet by the stove.