A profound shift in thinking came to me after reading Frankl's Man's Search For Meaning. Specifically - meaning chooses you.
When I started out as a programmer, I was so excited about learning how to code, how different languages work, memory management, and other concepts like that. My meaning then was becoming a good programmer. A few years later that changed. I see meaning in utilizing my skills to build product that matter to people.
Maybe programming was your passion in its own right, and maybe that's no longer true. What helps me is stopping to look for meaning in the same place I am used to, and re-ask the question - what do I want to be doing? What is important to me? What will give me meaning? And then go and do it for a while and see what happens.
My best wishes and good luck to you, friend.