Depth images dont get saved I render multiple frames in blender, and if not the frames also, I at least want to save the depth maps, as an image. As can be seen in the screenshot I have attached, I have added a 'File Output' node that specifies that path to save the depth images.  But during rendering, only the frames get saved.
In the output properties, I set the output path for the frames to be saved.
What is it that I am doing wrong here?
If you just render pass. It should work as you described.
Possible reasons why it doesn't:

you don't have enabled Output Properties &gt; Postprocessing &gt; Pipeline &gt; Compositor
or you don't have mark checkbox on top row of Compositor Editor &gt; Use Nodes
or if you rendered only single image - these are not saved automatically (without add-on)


According to your screen, should be rendered only Depth pass.
To render and save final render (Composite node if enabled) and Depth pass (File Output node) at the same time on Render Animation action - node tree should look like this (for example):

Note: Composite node can be also replaced File Output node. Benefit is not only separate output file, but you can also specify different file format or directory.