https://www.britannica.com/list/flags-that-look-alike https://www.britannica.com/list/flags-that-look-alike has a few more, including Iceland/Norway and Luxemb

https://www.britannica.com/list/flags-that-look-alike https://www.britannica.com/list/flags-that-look-alike has a few more, including Iceland/Norway and Luxembourg/the Netherlands