CHM Viewer SoftSea
Use this command to install CHM Viewer:
winget install --id=SoftSea.CHMViewer -e CHM Viewer is a free software to view CHM format files, it can quickly open the *.chm file, format and display the contents, very simple to use, support to find, copy, and output functions, at the same time, this is a completely freeware, free for personal use.