Image viewers

ImageGlass
https://imageglass.org

nomacs
https://nomacs.org

FastStone
https://www.faststone.org/index.htm

XnView
https://www.xnview.com/en/xnview/

Irfanview
https://www.irfanview.com



How to set default photo viewer:
https://www.guidingtech.com/best-alternatives-windows-10-photos-app/

Settings/Apps/DefaultApps/PhotoViewer