Ghidra extension that adds a separate window to watch register values using Ghidra's Symbolic Propogator
Download the provided .zip file and move it to your Extensions directory
$ wget https://github.com/jbert1/ghidraUtils/raw/main/RegisterValueTable/RegisterValueTableExtension.zip
$ mv RegisterValueTableExtension.zip /path-to-ghidra-root/Extensions/Ghidra/
Then, from Ghidra's front-end, "File->Install Extensions..." and select the checkbox next to the Extension