I want to know how to transition into PMM from a Business Analyst role? I have an Engineering background with a MBA, 6+ years exp in Project management. Every time I see job postings I always see that there is a requirement of PMM experience of 3+yrs

Hone in on the skills you have that align with what PMMs are asked to be good at - I'm SURE you already have a lot of them from your experience, which seems very relevant! The ones that come to mind for me are being great at prioritization, project management, data gathering/fact-finding, working cross-functionality, strong writing skills, and a willingness to get the job done and get your hands dirty - PMMs are often tasked with taking projects to the finish line and it behooves skilled PMMs to be resilient and malleable about their day-to-day work.