Btw, have you seen my Optimization lecture series. For example this is one of the videos Numerical Differentiation, Optimization Lecture 24 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-r_4q9luiooc.html
@dr.sanamujtabazoologist4422 Postdoc proposal is very much like a research proposal. It has an introduction to introduce and motivate the research which also refers to latest papers, then give the research problem statement, then method or methods for solving it. Then some expected results and main outcomes of the proposal. But postdoc proposals often have a page limit so you have to stick to that. I will make a video on this topic soon.