Aah!! this is a very common problem. My approach is
1) To understand WHY? what is stopping the management to move to a new tech stack? As in my current company, we have enterprise products with large users. Moving to new tech is risky with respect to the money, resources (devs), and product shipping & stability. Now, according to that I ll plan my strategy. So, now we are picking all new features in the latest tech stack as well as moving modules wise to new tech stack.
2) I will prepare a POC to show my management and team - WHY? Sometimes, people assume that because something is on social media it is influencing our tech decisions. So, make a POC of the existing module and highlight - less coding, time to deliver, scalability, performance, maintenance, learning curve, community support and if there are any cons too (so, that you can show them you are not biased to it and have done good research on this).