I dont think so, cause im May-2019 app. I did medicals twice. Once in 2019 and again in Aug -2020 and just got my DM. There is no specific order.My guess is that NDVO is giving out DMs to those who have expired medicals. I find it unfair because I'm 24th July 2019 applicant and my medical will expire on 21 Feb. 2021.
+ with this Covid times better not to get a re-medicals. That again is not easy.