As the adage goes:

Before enlightenment, carry water and chop wood.

After enlightenment, carry water and chop wood.

Your work doesn’t necessarily exist solely to serve your purpose but you can demonstrate your purpose in most work. Sometimes we set the bar too high for our job. It doesn’t have to be the complete embodiment of our purpose. If your work is such that you can find no means to demonstrate your purpose, find new work. But likely you can find ways big and small to align the job with who you are.