Adding favicon to safari

Hi everyone!

How do you add the favicon so it’s visible in the safari favorites part on Mac and iPhone as well?

Screen Shot 2023-01-26 at 19.21.23

Not sure what the problem is (is the favicon showing up with other browsers?), but maybe this could help you: html - Favicon not displaying on Safari - Stack Overflow

Tried a bunch of things, not sure which, but it worked. Thanks
Screen Shot 2023-01-27 at 10.14.27