I have a problem with this favicon I generated for a local server php project. It works fine on most browsers (Google Chrome, Mozilla Firefox and Opera) but on Microsoft Edg
It might be that your favicon is too big. According to the answer in the thread in this link should a favicon be 16 x 16 px:
https://forum.yola.com/yola/topics/edge-not-displaying-favicon
In my website (loekbergman.nl) is it working and I have a 16x16px icon indeed.