The D7200 is several years old and has long been supported by Camera Raw. Elements 2022 should support it out of the box.
What error message are you getting?
If you're using Nikon software to get the images from camera to Elements, try eliminating the Nikon software from your workflow. Older Nikon software is known to make Raw Nikon images unreadable to Adobe software.
If you still have trouble, please upload a typical D7200 Raw file to Dropbox or similar and post a link here so we can take a look.