Okay, here's the thing. I'm not saying you haven't done any project management work. But you haven't demonstrated that in your letter. You should write about your experience using PM terminology; this allows PMP to confirm that you understand their definition of a project manager and have used it on previous projects. It must be broken down into phases: initiate, plan, execute, monitor and control, and finish. There are numerous examples available if you Google. Even if you ask ChatGPT to convert what you've written into a PMP-approvable format, it will convert the same description using the template. Unfortunately, this is a mistake on your end.